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All questions of Fun with Magnets for Class 6 Exam
Which types of magnet have two poles close to each other?- a)Bar magnet
- b)Horse-shoe magnet
- c)Cylindrical magnet
- d)Electromagnet
Correct answer is option 'B'. Can you explain this answer?
Which types of magnet have two poles close to each other?
a)
Bar magnet
b)
Horse-shoe magnet
c)
Cylindrical magnet
d)
Electromagnet
|
Sagar Mehta answered |
In horse-shoe types of magnet have two poles close to each other.
Q.The property of attracting iron or other magnetic materials is calleda)Refractionb)Magnetismc)Retardationd)ReflectionCorrect answer is option 'B'. Can you explain this answer?
|
Anoushka Sharma answered |
The property of attracting iron or other magnetic materials is called magnetism.
When a magnet is suspended freely it always aligns itself in -------- direction?- a)North
- b)N-S
- c)N-W
- d)N-E
Correct answer is option 'B'. Can you explain this answer?
When a magnet is suspended freely it always aligns itself in -------- direction?
a)
North
b)
N-S
c)
N-W
d)
N-E
|
Poulomi Chakraborty answered |
Freely Suspended Magnet always points in the North-South direction even in the absence of any other magnet. This suggests that the Earth itself behaves as a magnet which causes a freely suspended magnet (or magnetic needle) to point always in a particular direction.
Lodestone is a- a)Soft stone having shining surface
- b)Stone having magnetic property
- c)Stone having iron
- d)Stone having dark black colour
Correct answer is option 'B'. Can you explain this answer?
Lodestone is a
a)
Soft stone having shining surface
b)
Stone having magnetic property
c)
Stone having iron
d)
Stone having dark black colour
|
Sanskriti Tiwari answered |
A Lodestone is a naturally occurring piece of magnetic iron oxide. It is often bound in a brass frame, and is oriented to place the magnetic poles at the ends.
The word magnet comes from the region called Magnesia in Asia Minor. The word lodestone comes from the use of pieces of ore from Norway and Sweden which were suspended and used as guiding or leading stone; the Saxon word L�den means "to lead".
This example is from the apparatus collection at Colby College.Magnetism of a magnet is lost by doing which of the following acts- a)Keeping in a box
- b)Heating
- c)Hammering
- d)Both b and c
Correct answer is option 'D'. Can you explain this answer?
Magnetism of a magnet is lost by doing which of the following acts
a)
Keeping in a box
b)
Heating
c)
Hammering
d)
Both b and c
|
Nilanjan Unni answered |
The correct option is D.
Most permanent magnets can hold up to being dropped a few times, but it will lose strength from repeated strikes with a hammer.A magnet subjected to heat experiences a reduction in its magnetic field as the particles within the magnet are moving at an increasingly faster and more sporadic rate. This jumbling confuses and misaligns the magnetic domains, causing the magnetism to decrease.
Most permanent magnets can hold up to being dropped a few times, but it will lose strength from repeated strikes with a hammer.A magnet subjected to heat experiences a reduction in its magnetic field as the particles within the magnet are moving at an increasingly faster and more sporadic rate. This jumbling confuses and misaligns the magnetic domains, causing the magnetism to decrease.
---------- is the only natural magnet.- a)Magnetite
- b)Ebonite
- c)Cobalt
- d)Nickel
Correct answer is option 'A'. Can you explain this answer?
---------- is the only natural magnet.
a)
Magnetite
b)
Ebonite
c)
Cobalt
d)
Nickel
|
Raj Mukherjee answered |
Magnetic form of Magnetite is the only mineral that is a natural magnet. Due to the magnetism of Lodestone, small iron particles are often found clinging to its surfaces.
Which of the following cannot be used to make a magnet?- a)Cobalt
- b)Iron
- c)Ebonite
- d)Steel
Correct answer is option 'C'. Can you explain this answer?
Which of the following cannot be used to make a magnet?
a)
Cobalt
b)
Iron
c)
Ebonite
d)
Steel
|
Sarojini Singh answered |
Iron, cobalt and steel are ferromagnetic materials which can be used to make magnet but ebonite cannot be used to make magnets.
Unlike poles of magnets _____ each other.- a)Attract
- b)Repel
- c)Both a and b
- d)None
Correct answer is option 'A'. Can you explain this answer?
Unlike poles of magnets _____ each other.
a)
Attract
b)
Repel
c)
Both a and b
d)
None
|
Ishan Choudhury answered |
Unlike poles of different magnets attract each other; like poles repel each other.
The nerves in our body transmits messages as __________- a)Electrical impulses
- b)Radio waves
- c)Electromagnetic waves
- d)None
Correct answer is option 'A'. Can you explain this answer?
The nerves in our body transmits messages as __________
a)
Electrical impulses
b)
Radio waves
c)
Electromagnetic waves
d)
None
|
Vikas Choudhury answered |
The nerves in our body transmits messages as electrical impulses to the brain to transmit signals to different parts of the body.
And an electical impulse is nothing but the electrical impulse moving down an axon is called a nerve impulse.
Nerve impulses are an important part of how the nervous system communicates.
The activation of neurons triggers nerve impulses, which carry instructions from neuron to neuron and back and forth from the brain to the rest of the body.
How many combined north and south poles are present in a magnet if it is broken into 6 pieces without loss of magnetism?
- a)Six
- b)Twelve
- c)Two
- d)Zero
Correct answer is option 'B'. Can you explain this answer?
How many combined north and south poles are present in a magnet if it is broken into 6 pieces without loss of magnetism?
a)
Six
b)
Twelve
c)
Two
d)
Zero
|
Rishika Tiwari answered |
When a magnet is broken into pieces every piece will have 1 pair of north and south pole.
So if its broken into 6 pieces then each piece will be having one north pole and one south pole. So 6 north poles and 6 south poles, combined will be 12.
So if its broken into 6 pieces then each piece will be having one north pole and one south pole. So 6 north poles and 6 south poles, combined will be 12.
Which of the following is a non- magnetic substance?
- a)Cobalt
- b)Nickel
- c)Iron
- d)Plastic
Correct answer is option 'D'. Can you explain this answer?
Which of the following is a non- magnetic substance?
a)
Cobalt
b)
Nickel
c)
Iron
d)
Plastic
|
Anjali Kapoor answered |
Iron, cobalt and nickel are magnetic materials.
The south pole of the freely suspended magnet points towards ______?- a)Geographical South
- b)Geographical North
- c)Geographical East
- d)Geographical West
Correct answer is option 'B'. Can you explain this answer?
The south pole of the freely suspended magnet points towards ______?
a)
Geographical South
b)
Geographical North
c)
Geographical East
d)
Geographical West
|
Aditya Menon answered |
Understanding Magnet Poles
Magnets have two poles: the north pole and the south pole. When a magnet is freely suspended, it can rotate and align itself with the Earth's magnetic field.
Why the South Pole Points North
- The south pole of a magnet is attracted to the north pole of the Earth’s magnetic field.
- The Earth behaves like a giant magnet, with its magnetic north pole located near the geographic north pole.
Geographical vs. Magnetic Poles
- The Earth's geographical north is not the same as its magnetic north.
- The magnetic north pole is the point that the north pole of a magnet is attracted to, which is actually located in the northern hemisphere.
Key Points
- When a magnet is suspended freely, its south pole will point towards the geographical north because:
- The Earth's magnetic field attracts the south pole of the magnet.
- This is why compasses work; the needle (which is a small magnet) aligns itself with the Earth's magnetic field.
Conclusion
In summary, the south pole of a freely suspended magnet points towards geographical north due to the magnetic attraction between the Earth and the magnet. This fundamental principle is what allows us to navigate using compasses.
Magnets have two poles: the north pole and the south pole. When a magnet is freely suspended, it can rotate and align itself with the Earth's magnetic field.
Why the South Pole Points North
- The south pole of a magnet is attracted to the north pole of the Earth’s magnetic field.
- The Earth behaves like a giant magnet, with its magnetic north pole located near the geographic north pole.
Geographical vs. Magnetic Poles
- The Earth's geographical north is not the same as its magnetic north.
- The magnetic north pole is the point that the north pole of a magnet is attracted to, which is actually located in the northern hemisphere.
Key Points
- When a magnet is suspended freely, its south pole will point towards the geographical north because:
- The Earth's magnetic field attracts the south pole of the magnet.
- This is why compasses work; the needle (which is a small magnet) aligns itself with the Earth's magnetic field.
Conclusion
In summary, the south pole of a freely suspended magnet points towards geographical north due to the magnetic attraction between the Earth and the magnet. This fundamental principle is what allows us to navigate using compasses.
______ is a device used by pilots and navigators used to find the direction.- a)Barometer
- b)Thermometer
- c)Magnetic compass
- d)None
Correct answer is option 'C'. Can you explain this answer?
______ is a device used by pilots and navigators used to find the direction.
a)
Barometer
b)
Thermometer
c)
Magnetic compass
d)
None
|
|
Anita Menon answered |
A magnetic compass is an instrument used for navigation and orientation that shows direction relative to the geographic cardinal directions (or points). Usually, a diagram called a compass rose shows the directions north, south, east, and west on the compass face as abbreviated initials.
Which of the following is not a magnetic substance?- a)Nickel
- b)Silver
- c)Cobalt
- d)Iron
Correct answer is option 'B'. Can you explain this answer?
Which of the following is not a magnetic substance?
a)
Nickel
b)
Silver
c)
Cobalt
d)
Iron
|
Utkarsh Joshi answered |
Iron, nickel and cobalt are magnetic substances while silver is not a magnetic substance.
Like poles of magnets -------- each other.- a)Attract
- b)Repel
- c)Both a and b
- d)None
Correct answer is option 'B'. Can you explain this answer?
Like poles of magnets -------- each other.
a)
Attract
b)
Repel
c)
Both a and b
d)
None
|
Manoj Iyer answered |
Like poles of two magnets repel each other, The force between them is non contact force and magnetic force.
Artificial magnets are made in different shapes such as __________, __________, and ____________.- a)rectangular, cylindrical, spherical
- b)cubic, prismatic, triangular
- c)circular, flat, conical
- d)cylindrical, bar, horseshoe
Correct answer is option 'D'. Can you explain this answer?
a)
rectangular, cylindrical, spherical
b)
cubic, prismatic, triangular
c)
circular, flat, conical
d)
cylindrical, bar, horseshoe
|
Preethi Dasgupta answered |
Understanding Artificial Magnets
Artificial magnets are man-made magnets created using various materials, primarily ferromagnetic substances. They are produced in different shapes to cater to specific applications.
Common Shapes of Artificial Magnets
- Cylindrical Magnets:
These magnets have a circular cross-section and are often used in applications where a uniform magnetic field is needed, such as in motors and generators.
- Bar Magnets:
The classic shape, bar magnets are rectangular and have a north and south pole at each end. They are widely used in classrooms for demonstrations and in various everyday applications.
- Horseshoe Magnets:
Shaped like a horseshoe, these magnets have their poles very close together, creating a strong magnetic field. They are commonly used in industrial applications and for lifting heavy ferromagnetic objects.
Why These Shapes Matter
- Each shape serves a specific purpose based on how the magnetic field is distributed.
- The shape can influence the strength and direction of the magnetic field, making some shapes more suitable for particular tasks than others.
- For instance, horseshoe magnets provide a stronger magnetic pull due to the proximity of the poles.
In conclusion, the correct answer is option 'D' because cylindrical, bar, and horseshoe are the primary shapes in which artificial magnets are manufactured, each serving unique functions in various applications.
Artificial magnets are man-made magnets created using various materials, primarily ferromagnetic substances. They are produced in different shapes to cater to specific applications.
Common Shapes of Artificial Magnets
- Cylindrical Magnets:
These magnets have a circular cross-section and are often used in applications where a uniform magnetic field is needed, such as in motors and generators.
- Bar Magnets:
The classic shape, bar magnets are rectangular and have a north and south pole at each end. They are widely used in classrooms for demonstrations and in various everyday applications.
- Horseshoe Magnets:
Shaped like a horseshoe, these magnets have their poles very close together, creating a strong magnetic field. They are commonly used in industrial applications and for lifting heavy ferromagnetic objects.
Why These Shapes Matter
- Each shape serves a specific purpose based on how the magnetic field is distributed.
- The shape can influence the strength and direction of the magnetic field, making some shapes more suitable for particular tasks than others.
- For instance, horseshoe magnets provide a stronger magnetic pull due to the proximity of the poles.
In conclusion, the correct answer is option 'D' because cylindrical, bar, and horseshoe are the primary shapes in which artificial magnets are manufactured, each serving unique functions in various applications.
When a N pole of a bar magnet is brought near the north pole of a freely suspended magnetic needle, then it -----------?- a)Attracts
- b)Repels
- c)It rotates
- d)None
Correct answer is option 'B'. Can you explain this answer?
When a N pole of a bar magnet is brought near the north pole of a freely suspended magnetic needle, then it -----------?
a)
Attracts
b)
Repels
c)
It rotates
d)
None
|
Kunal Mehta answered |
Shouldn't it be rotate as it is suspended freelyDepends upon the mass and the mag
Which of the following gets attracted to a magnet?- a)Copy book
- b)Silver spoon
- c)Comb
- d)Common pins
Correct answer is option 'D'. Can you explain this answer?
Which of the following gets attracted to a magnet?
a)
Copy book
b)
Silver spoon
c)
Comb
d)
Common pins
|
Geetika Shah answered |
A magnet attracts the steel pin. When the pin touches the magnet it can't attract it any closer and it sticks to the magnet. However, a magnet will attract a pin from a distance.
How can you identify the north pole of a magnet if it is not marked?- a)By using a compass to see which end aligns with the north.
- b)By the color of the magnet.
- c)By its shape.
- d)By its weight.
Correct answer is option 'A'. Can you explain this answer?
a)
By using a compass to see which end aligns with the north.
b)
By the color of the magnet.
c)
By its shape.
d)
By its weight.
|
Dr Manju Sen answered |
To identify the north pole of an unmarked magnet, you can use a compass. The end of the magnet that aligns with the north direction indicated by the compass is the north pole. This method is based on the fact that the north pole of a magnet is attracted to the Earth's magnetic North.
______________ type of magnet is used in cranes to lift heavy containers from ships.- a)Bar magnet
- b)Cylindrical magnet
- c)Electromagnet
- d)Horseshoe magnet
Correct answer is option 'C'. Can you explain this answer?
______________ type of magnet is used in cranes to lift heavy containers from ships.
a)
Bar magnet
b)
Cylindrical magnet
c)
Electromagnet
d)
Horseshoe magnet
|
Abhishek Chakraborty answered |
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of wire wound into a coil.
When a magnet is placed on a plastic plate with common pins spread on it, then ----- a)Pins stick all around the magnet
- b)Pins stick at the middle of the magnet
- c)Pins stick at the ends of the magnet
- d)None
Correct answer is option 'C'. Can you explain this answer?
When a magnet is placed on a plastic plate with common pins spread on it, then ----
a)
Pins stick all around the magnet
b)
Pins stick at the middle of the magnet
c)
Pins stick at the ends of the magnet
d)
None
|
Mrinalini Patel answered |
The poles of the magnet has more attraction of magnetic force. that's why pins stick ends of the magnet.
Magnets lose their properties significantly if- a)Left in the open
- b)Touched with iron
- c)Dropped from a height repeatedly
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
Magnets lose their properties significantly if
a)
Left in the open
b)
Touched with iron
c)
Dropped from a height repeatedly
d)
None of these
|
|
Akshaya Chandra answered |
As it is dropped from height the magnetic power gets spoiler due to the force of wind from the height. hope you understand
Which of the following gets demagnetised when a powerful magnet is kept near it- a)Plastic ruler
- b)Compact disc
- c)Glass tumbler
- d)Wood
Correct answer is option 'B'. Can you explain this answer?
Which of the following gets demagnetised when a powerful magnet is kept near it
a)
Plastic ruler
b)
Compact disc
c)
Glass tumbler
d)
Wood
|
|
Vibhor Goyal answered |
The magnetic property of a compact disk may be damaged when a powerful magnet is kept near it. Plastic glass and wood are non-magnetic materials hence cannot be magnetised or demagnetised.
Which of the following does not get demagnetised when a powerful magnet is kept near it- a)CD
- b)music system
- c)Cell phone
- d)Comb
Correct answer is option 'D'. Can you explain this answer?
Which of the following does not get demagnetised when a powerful magnet is kept near it
a)
CD
b)
music system
c)
Cell phone
d)
Comb
|
|
Ananya Das answered |
The correct answer is D as COMB does not get demagnetised when a powerful magnet is kept near it
The North end of the freely suspended magnet points towards _____?
- a)Geographical North
- b)Geographical South
- c)Geographical East
- d)Geographical West
Correct answer is option 'A'. Can you explain this answer?
The North end of the freely suspended magnet points towards _____?
a)
Geographical North
b)
Geographical South
c)
Geographical East
d)
Geographical West
|
Aashna Chopra answered |
The earth behaves as a magnetic dipole . Therefore a freely suspended magnet always points towards in the north-south direction because the north pole of the suspended magnet attracts the south pole of the earth's magnet which is the geographical north pole of the earth.
What happens if you heat a magnet?- a)It becomes stronger.
- b)It becomes weaker.
- c)It changes color.
- d)It gains electrical properties.
Correct answer is option 'B'. Can you explain this answer?
a)
It becomes stronger.
b)
It becomes weaker.
c)
It changes color.
d)
It gains electrical properties.
|
Sankar Saha answered |
Understanding the Effect of Heat on Magnets
When a magnet is exposed to heat, it undergoes significant changes that affect its magnetic properties. The correct answer to the question is that it becomes weaker. Here's a detailed explanation:
How Heat Affects Magnetism
- Disruption of Magnetic Domains:
Magnets are composed of tiny regions called magnetic domains, which are aligned in a specific direction. When heated, these domains can become misaligned due to increased thermal energy.
- Loss of Alignment:
As the temperature rises, the kinetic energy of the atoms increases, causing the domains to lose their fixed alignment. This misalignment leads to a decrease in the overall magnetic strength of the magnet.
Temperature Threshold
- Curie Point:
Every magnetic material has a specific temperature known as the Curie point. Once this temperature is reached, the material loses its permanent magnetism entirely and can become a non-magnetic substance.
Practical Implications
- Applications in Everyday Life:
This principle is crucial in various applications, such as in electric motors, where excessive heat can cause magnets to weaken, leading to reduced efficiency.
- Safety Considerations:
Understanding the effects of heat can help in handling magnets safely, avoiding situations that might lead to their weakening.
In conclusion, heating a magnet results in a decrease in its strength due to the disruption of its internal structure.
When a magnet is exposed to heat, it undergoes significant changes that affect its magnetic properties. The correct answer to the question is that it becomes weaker. Here's a detailed explanation:
How Heat Affects Magnetism
- Disruption of Magnetic Domains:
Magnets are composed of tiny regions called magnetic domains, which are aligned in a specific direction. When heated, these domains can become misaligned due to increased thermal energy.
- Loss of Alignment:
As the temperature rises, the kinetic energy of the atoms increases, causing the domains to lose their fixed alignment. This misalignment leads to a decrease in the overall magnetic strength of the magnet.
Temperature Threshold
- Curie Point:
Every magnetic material has a specific temperature known as the Curie point. Once this temperature is reached, the material loses its permanent magnetism entirely and can become a non-magnetic substance.
Practical Implications
- Applications in Everyday Life:
This principle is crucial in various applications, such as in electric motors, where excessive heat can cause magnets to weaken, leading to reduced efficiency.
- Safety Considerations:
Understanding the effects of heat can help in handling magnets safely, avoiding situations that might lead to their weakening.
In conclusion, heating a magnet results in a decrease in its strength due to the disruption of its internal structure.
State whether the following statement is True or FalseMagnets can attract pieces of iron.- a)True
- b)False
Correct answer is option 'A'. Can you explain this answer?
State whether the following statement is True or False
Magnets can attract pieces of iron.
a)
True
b)
False
|
|
Tanishq Mehra answered |
Explanation:
Magnets can attract pieces of iron
- True
- Magnets have the ability to attract pieces of iron due to the magnetic field they produce.
- This attraction is a result of the alignment of magnetic domains in the iron when it comes in contact with the magnet.
- The magnetic force between the magnet and the iron object causes them to be drawn towards each other.
- This property of magnets is commonly used in various applications such as magnetic compasses, refrigerator magnets, and magnetic toys.
Magnets can attract pieces of iron
- True
- Magnets have the ability to attract pieces of iron due to the magnetic field they produce.
- This attraction is a result of the alignment of magnetic domains in the iron when it comes in contact with the magnet.
- The magnetic force between the magnet and the iron object causes them to be drawn towards each other.
- This property of magnets is commonly used in various applications such as magnetic compasses, refrigerator magnets, and magnetic toys.
Which of the following is non-magnetic?- a)Cobalt
- b)Iron
- c)Nickel
- d)Copper
Correct answer is option 'D'. Can you explain this answer?
Which of the following is non-magnetic?
a)
Cobalt
b)
Iron
c)
Nickel
d)
Copper
|
|
Rounak Chawla answered |
Understanding Magnetic and Non-Magnetic Materials
Magnetic materials are those that are attracted to magnets and can be magnetized themselves. Non-magnetic materials do not exhibit these properties. Let's explore the given options.
Magnetic Materials
- Cobalt: A ferromagnetic metal, cobalt is attracted to magnets and can be magnetized.
- Iron: One of the most well-known magnetic materials, iron is highly attracted to magnets and is often used in magnetic applications.
- Nickel: Similar to cobalt and iron, nickel is also ferromagnetic and can be magnetized.
Non-Magnetic Material
- Copper: Unlike the above metals, copper is classified as a non-magnetic material. It does not get attracted to magnets and cannot be magnetized.
Why is Copper Non-Magnetic?
- Atomic Structure: The atomic structure of copper does not allow for the alignment of magnetic domains that is necessary for magnetism.
- Conductivity: Copper is known for its excellent electrical conductivity, which is a property that does not relate to magnetism.
Conclusion
In summary, while cobalt, iron, and nickel are all magnetic metals that can interact with magnets, copper stands out as a non-magnetic material. This distinction makes copper valuable in applications where magnetism may interfere, such as in electrical wiring and electronics.
Magnetic materials are those that are attracted to magnets and can be magnetized themselves. Non-magnetic materials do not exhibit these properties. Let's explore the given options.
Magnetic Materials
- Cobalt: A ferromagnetic metal, cobalt is attracted to magnets and can be magnetized.
- Iron: One of the most well-known magnetic materials, iron is highly attracted to magnets and is often used in magnetic applications.
- Nickel: Similar to cobalt and iron, nickel is also ferromagnetic and can be magnetized.
Non-Magnetic Material
- Copper: Unlike the above metals, copper is classified as a non-magnetic material. It does not get attracted to magnets and cannot be magnetized.
Why is Copper Non-Magnetic?
- Atomic Structure: The atomic structure of copper does not allow for the alignment of magnetic domains that is necessary for magnetism.
- Conductivity: Copper is known for its excellent electrical conductivity, which is a property that does not relate to magnetism.
Conclusion
In summary, while cobalt, iron, and nickel are all magnetic metals that can interact with magnets, copper stands out as a non-magnetic material. This distinction makes copper valuable in applications where magnetism may interfere, such as in electrical wiring and electronics.
It has a needle, which is itself a magnet.What is it - a)Magnet
- b)Clock
- c)Compass
- d)All of these
Correct answer is option 'C'. Can you explain this answer?
It has a needle, which is itself a magnet.What is it
a)
Magnet
b)
Clock
c)
Compass
d)
All of these
|
Saranya Chakraborty answered |
Understanding the Needle in a Compass
A compass is a navigational instrument that utilizes a magnetized needle to indicate direction. Here’s a detailed explanation of why the correct answer is option 'C' - Compass.
What is a Compass?
- A compass is a device used for navigation and orientation.
- It helps determine geographic directions (North, South, East, West).
The Needle in a Compass
- The needle in a compass is typically made of a ferromagnetic material.
- This needle is magnetized, allowing it to align itself with the Earth's magnetic field.
How Does it Work?
- The compass needle points towards the magnetic North Pole due to the Earth's magnetic field.
- When you rotate the compass, the needle continuously adjusts its position to indicate the direction.
Why Not Other Options?
- Magnet: While a compass contains a magnetized needle, a magnet alone does not provide directional information.
- Clock: A clock tells time and does not have a needle that functions as a magnet.
Conclusion
- The presence of a magnetized needle that helps in determining direction is unique to the compass.
- Therefore, the correct answer to the question is indeed option 'C' - Compass.
A compass is a navigational instrument that utilizes a magnetized needle to indicate direction. Here’s a detailed explanation of why the correct answer is option 'C' - Compass.
What is a Compass?
- A compass is a device used for navigation and orientation.
- It helps determine geographic directions (North, South, East, West).
The Needle in a Compass
- The needle in a compass is typically made of a ferromagnetic material.
- This needle is magnetized, allowing it to align itself with the Earth's magnetic field.
How Does it Work?
- The compass needle points towards the magnetic North Pole due to the Earth's magnetic field.
- When you rotate the compass, the needle continuously adjusts its position to indicate the direction.
Why Not Other Options?
- Magnet: While a compass contains a magnetized needle, a magnet alone does not provide directional information.
- Clock: A clock tells time and does not have a needle that functions as a magnet.
Conclusion
- The presence of a magnetized needle that helps in determining direction is unique to the compass.
- Therefore, the correct answer to the question is indeed option 'C' - Compass.
Electric bell is an example of _____________magnet.- a)Bar magnet
- b)Cylindrical magnet
- c)Electromagnet
- d)Horseshoe magnet
Correct answer is option 'C'. Can you explain this answer?
Electric bell is an example of _____________magnet.
a)
Bar magnet
b)
Cylindrical magnet
c)
Electromagnet
d)
Horseshoe magnet
|
Swara Mukherjee answered |
An electric bell contains an electromagnet, consisting of coils of insulated wire wound round iron rods. When an electric current flows through the coils, the rods become magnetic and attract a piece of iron attached to a clapper. The clapper hits the bell and makes it ring.
What happens to iron filings when a bar magnet is moved across them?- a)They spread evenly across the magnet.
- b)They stick more at the ends of the magnet.
- c)They form a uniform layer around the magnet.
- d)They disappear completely.
Correct answer is option 'B'. Can you explain this answer?
a)
They spread evenly across the magnet.
b)
They stick more at the ends of the magnet.
c)
They form a uniform layer around the magnet.
d)
They disappear completely.
|
EduRev Class 6 answered |
Iron filings tend to stick more at the ends of a bar magnet when the magnet is moved across them. This is because the magnetic field is strongest at the poles of the magnet, which attracts more filings to these areas. An interesting fact is that this property helps in visualizing the magnetic field lines around a magnet.
------------ is the surest test of magnetism.- a)Attraction
- b)Rotation
- c)Repulsion
- d)None
Correct answer is option 'C'. Can you explain this answer?
------------ is the surest test of magnetism.
a)
Attraction
b)
Rotation
c)
Repulsion
d)
None
|
Ishaan Chawla answered |
Repulsion
Repulsion is the surest test of magnetism because it is a unique property of magnets. When two magnets are brought close to each other, they can either attract or repel each other.
Explanation
- When two magnets repel each other, it indicates that they have like poles facing each other. This is a characteristic property of magnets and helps in identifying the presence of magnetism.
- Repulsion is a more reliable test compared to attraction because some materials that are not magnetized can still be attracted to magnets due to their magnetic properties.
- By observing repulsion between two magnets, we can confirm the presence of magnetism in the materials.
Significance
- Repulsion is a fundamental property of magnets and plays a crucial role in various applications of magnetism such as in magnetic levitation, magnetic resonance imaging (MRI), and electric motors.
- Understanding repulsion helps in distinguishing between magnetic and non-magnetic materials, which is essential in various scientific and technological fields.
In conclusion, repulsion is the surest test of magnetism as it is a unique property of magnets that helps in identifying the presence of magnetism in materials.
What will happen when three bar magnets are hung in the manner as shown below?
- a)Nothing will happen.
- b)Magnet Y will turn round and round.
- c)Magnet Y will move towards magnet Z
- d)Magnet Y will move towards magnet X.
Correct answer is option 'D'. Can you explain this answer?
What will happen when three bar magnets are hung in the manner as shown below?
a)
Nothing will happen.
b)
Magnet Y will turn round and round.
c)
Magnet Y will move towards magnet Z
d)
Magnet Y will move towards magnet X.
|
Rahul Mehra answered |
Magnet Y will get attracted towards magnet X and repelled by magnet -Z.
Materials which are attracted towards a magnet are known by which name?- a)Magnetism
- b)Non-magnetic
- c)Manganese
- d)Magnetic
Correct answer is option 'D'. Can you explain this answer?
Materials which are attracted towards a magnet are known by which name?
a)
Magnetism
b)
Non-magnetic
c)
Manganese
d)
Magnetic
|
Torcia Education answered |
Materials that are attracted to a magnet are called "magnetic" materials. These materials are influenced by a magnetic field, unlike non-magnetic materials which are not attracted to magnets.
Thus, the correct answer is D: Magnetic.
A bar magnet is immersed in a heap of iron filings and pulled out. The amount of iron filing clinging to the- a)North pole is almost equal to the south pole.
- b)North pole is much more than the south pole.
- c)North pole is much less than the south pole.
- d)Magnet will be same all along its length.
Correct answer is option 'A'. Can you explain this answer?
A bar magnet is immersed in a heap of iron filings and pulled out. The amount of iron filing clinging to the
a)
North pole is almost equal to the south pole.
b)
North pole is much more than the south pole.
c)
North pole is much less than the south pole.
d)
Magnet will be same all along its length.
|
Sounak Ghoshal answered |
Understanding the Behavior of a Magnet with Iron Filings
When a bar magnet is immersed in iron filings and pulled out, the distribution of the filings can reveal important properties of magnetism.
Magnetic Poles
- A bar magnet has two distinct poles: the North pole and the South pole.
- Each pole has a magnetic field that attracts iron filings.
Attraction of Iron Filings
- North Pole Attraction: The North pole attracts iron filings due to its magnetic field, causing a significant amount of filings to cling to it.
- South Pole Attraction: Similarly, the South pole attracts iron filings, but the amount can vary based on the strength of the magnet and its orientation.
Equal Clinging of Iron Filings
- Observations show that the amount of filings clinging to the North pole is almost equal to that clinging to the South pole.
- This is because both poles have similar strengths, allowing them to attract comparable amounts of filings.
Why Option A is Correct
- The equal clinging of iron filings to both poles indicates that the magnet's effect is balanced.
- While there might be slight variations, the general principle is that both poles attract iron filings effectively.
Conclusion
- When analyzing the clinging iron filings, it becomes clear that the North and South poles of a magnet have a nearly equal capacity to attract iron filings, leading to the correct answer being option A.
When a bar magnet is immersed in iron filings and pulled out, the distribution of the filings can reveal important properties of magnetism.
Magnetic Poles
- A bar magnet has two distinct poles: the North pole and the South pole.
- Each pole has a magnetic field that attracts iron filings.
Attraction of Iron Filings
- North Pole Attraction: The North pole attracts iron filings due to its magnetic field, causing a significant amount of filings to cling to it.
- South Pole Attraction: Similarly, the South pole attracts iron filings, but the amount can vary based on the strength of the magnet and its orientation.
Equal Clinging of Iron Filings
- Observations show that the amount of filings clinging to the North pole is almost equal to that clinging to the South pole.
- This is because both poles have similar strengths, allowing them to attract comparable amounts of filings.
Why Option A is Correct
- The equal clinging of iron filings to both poles indicates that the magnet's effect is balanced.
- While there might be slight variations, the general principle is that both poles attract iron filings effectively.
Conclusion
- When analyzing the clinging iron filings, it becomes clear that the North and South poles of a magnet have a nearly equal capacity to attract iron filings, leading to the correct answer being option A.
Which of the following is the best way to keep magnets?- a)
- b)
- c)
- d)
Correct answer is option 'D'. Can you explain this answer?
Which of the following is the best way to keep magnets?
a)
b)
c)
d)
|
Anirudh Kumar answered |
Soft iron placed across the poles will preserve the magnetism for a long time.
The figure shows a ring magnet, X, floating above another ring magnet, Y. This is because
- a)Magnet X is lighter than magnet Y
- b)Magnet Vis more powerful than magnet X
- c)The like poles of both magnets are facing each other and they repel each other
- d)The unlike poles of both magnets are facing each other and they attract each other.
Correct answer is option 'C'. Can you explain this answer?
The figure shows a ring magnet, X, floating above another ring magnet, Y. This is because
a)
Magnet X is lighter than magnet Y
b)
Magnet Vis more powerful than magnet X
c)
The like poles of both magnets are facing each other and they repel each other
d)
The unlike poles of both magnets are facing each other and they attract each other.
|
Malavika Kulkarni answered |
Like poles of magnets repel each other.
Which of the following is incorrect?
- a)To increase the magnetic strength, increase the number of strokes while creating magnets.
- b)To increase the magnetic strength, increase the number of coils around the nail.
- c)Magnetic force is a pulling force only.
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
Which of the following is incorrect?
a)
To increase the magnetic strength, increase the number of strokes while creating magnets.
b)
To increase the magnetic strength, increase the number of coils around the nail.
c)
Magnetic force is a pulling force only.
d)
None of these
|
Varun Jain answered |
Magnetic force is a pulling force only: Incorrect
Explanation:
Magnetic force is not only a pulling force but can also be a pushing force. The statement given in option C is incorrect because magnetic forces can attract or repel objects, depending on the poles of the magnets involved.
Magnetic Forces:
Magnetic forces are caused by the interaction between magnetic fields. Magnets have two poles, a north pole and a south pole. Like poles repel each other, while opposite poles attract each other. This means that a north pole of one magnet will repel the north pole of another magnet, and similarly, the south pole of one magnet will repel the south pole of another magnet. On the other hand, the north pole of one magnet will attract the south pole of another magnet, and vice versa.
Examples of Magnetic Forces:
1. When two magnets with opposite poles (north and south) are brought close to each other, they will attract and stick together.
2. Similarly, if two magnets with the same poles (north and north or south and south) are brought close to each other, they will repel and push each other away.
Application Examples:
Magnetic forces have various applications in our daily lives, such as:
1. Refrigerator magnets: They use magnetic force to stick to the surface of the refrigerator.
2. Magnetic door catches: These use magnetic force to hold doors in place.
3. Magnetic levitation trains: They utilize magnetic forces to achieve levitation and propulsion.
Conclusion:
In conclusion, magnetic forces are not limited to just pulling objects together. They can also push objects apart, depending on the orientation of the magnetic poles involved.
Explanation:
Magnetic force is not only a pulling force but can also be a pushing force. The statement given in option C is incorrect because magnetic forces can attract or repel objects, depending on the poles of the magnets involved.
Magnetic Forces:
Magnetic forces are caused by the interaction between magnetic fields. Magnets have two poles, a north pole and a south pole. Like poles repel each other, while opposite poles attract each other. This means that a north pole of one magnet will repel the north pole of another magnet, and similarly, the south pole of one magnet will repel the south pole of another magnet. On the other hand, the north pole of one magnet will attract the south pole of another magnet, and vice versa.
Examples of Magnetic Forces:
1. When two magnets with opposite poles (north and south) are brought close to each other, they will attract and stick together.
2. Similarly, if two magnets with the same poles (north and north or south and south) are brought close to each other, they will repel and push each other away.
Application Examples:
Magnetic forces have various applications in our daily lives, such as:
1. Refrigerator magnets: They use magnetic force to stick to the surface of the refrigerator.
2. Magnetic door catches: These use magnetic force to hold doors in place.
3. Magnetic levitation trains: They utilize magnetic forces to achieve levitation and propulsion.
Conclusion:
In conclusion, magnetic forces are not limited to just pulling objects together. They can also push objects apart, depending on the orientation of the magnetic poles involved.
What is a common characteristic of materials that are attracted to magnets?- a)They are usually non-metallic.
- b)They contain iron, nickel, or cobalt.
- c)They are made of plastic or rubber.
- d)They are always colored red.
Correct answer is option 'B'. Can you explain this answer?
a)
They are usually non-metallic.
b)
They contain iron, nickel, or cobalt.
c)
They are made of plastic or rubber.
d)
They are always colored red.
|
|
Dr Manju Sen answered |
Materials that are attracted to magnets typically contain iron, nickel, or cobalt. These materials are magnetic, meaning they can be attracted by a magnet due to their magnetic properties. This characteristic is used to identify magnetic and non-magnetic materials in various contexts.
Reeta puts two different objects in each of the following containers.
Container (i): Copper coin and iron nail
Container (ii): Iron and wood
Container (iii): Marble and cloth
Container (iv): Nickel coin and paper bits
She can use a magnet to separate the objects in containers- a)(i), (ii) and (iv)
- b)(i), (ii) and (iii)
- c)(i) and (ii)
- d)(i), (ii), (iii) and (iv).
Correct answer is option 'A'. Can you explain this answer?
Reeta puts two different objects in each of the following containers.
Container (i): Copper coin and iron nail
Container (ii): Iron and wood
Container (iii): Marble and cloth
Container (iv): Nickel coin and paper bits
She can use a magnet to separate the objects in containers
Container (i): Copper coin and iron nail
Container (ii): Iron and wood
Container (iii): Marble and cloth
Container (iv): Nickel coin and paper bits
She can use a magnet to separate the objects in containers
a)
(i), (ii) and (iv)
b)
(i), (ii) and (iii)
c)
(i) and (ii)
d)
(i), (ii), (iii) and (iv).
|
|
Sounak Ghoshal answered |
Understanding the Use of a Magnet for Separation
To determine which containers can have their objects separated using a magnet, we need to identify which objects are magnetic.
Magnetic Objects
- Copper Coin: Non-magnetic
- Iron Nail: Magnetic
- Iron: Magnetic
- Wood: Non-magnetic
- Marble: Non-magnetic
- Cloth: Non-magnetic
- Nickel Coin: Magnetic (Nickel is a metal that can be attracted to magnets)
- Paper Bits: Non-magnetic
Analysis of Each Container
- Container (i): Contains a copper coin (non-magnetic) and an iron nail (magnetic).
- *Separation Possible*: Yes, the iron nail can be attracted by a magnet.
- Container (ii): Contains iron (magnetic) and wood (non-magnetic).
- *Separation Possible*: Yes, the iron can be attracted by a magnet.
- Container (iii): Contains marble (non-magnetic) and cloth (non-magnetic).
- *Separation Possible*: No, since neither object is magnetic.
- Container (iv): Contains a nickel coin (magnetic) and paper bits (non-magnetic).
- *Separation Possible*: Yes, the nickel coin can be attracted by a magnet.
Conclusion
Based on this analysis, Reeta can use a magnet to separate the objects in:
- Container (i): Iron nail
- Container (ii): Iron
- Container (iv): Nickel coin
Thus, the correct option is (a) (i), (ii), and (iv), as these containers contain at least one magnetic object that can be separated using a magnet.
To determine which containers can have their objects separated using a magnet, we need to identify which objects are magnetic.
Magnetic Objects
- Copper Coin: Non-magnetic
- Iron Nail: Magnetic
- Iron: Magnetic
- Wood: Non-magnetic
- Marble: Non-magnetic
- Cloth: Non-magnetic
- Nickel Coin: Magnetic (Nickel is a metal that can be attracted to magnets)
- Paper Bits: Non-magnetic
Analysis of Each Container
- Container (i): Contains a copper coin (non-magnetic) and an iron nail (magnetic).
- *Separation Possible*: Yes, the iron nail can be attracted by a magnet.
- Container (ii): Contains iron (magnetic) and wood (non-magnetic).
- *Separation Possible*: Yes, the iron can be attracted by a magnet.
- Container (iii): Contains marble (non-magnetic) and cloth (non-magnetic).
- *Separation Possible*: No, since neither object is magnetic.
- Container (iv): Contains a nickel coin (magnetic) and paper bits (non-magnetic).
- *Separation Possible*: Yes, the nickel coin can be attracted by a magnet.
Conclusion
Based on this analysis, Reeta can use a magnet to separate the objects in:
- Container (i): Iron nail
- Container (ii): Iron
- Container (iv): Nickel coin
Thus, the correct option is (a) (i), (ii), and (iv), as these containers contain at least one magnetic object that can be separated using a magnet.
Arun suspended a bar magnet on a string as shown in the diagram below. He brought 3 bar-shaped objects P, Q and R towards the bar magnet. He placed the ends (X and Y) of each object, near the north pole of the bar magnet and recorded his observations in the table below.
Which of the object(s) is/are the magnet?
- a)P only
- b)Q only
- c)P and Q only
- d)P and R only
Correct answer is option 'C'. Can you explain this answer?
Arun suspended a bar magnet on a string as shown in the diagram below. He brought 3 bar-shaped objects P, Q and R towards the bar magnet. He placed the ends (X and Y) of each object, near the north pole of the bar magnet and recorded his observations in the table below.
Which of the object(s) is/are the magnet?
a)
P only
b)
Q only
c)
P and Q only
d)
P and R only
|
Snehal Kaur answered |
We know that every magnet has two poles, one north pole and one south pole. The force of attraction or repulsion in a magnet is strongest at the poles. Like poles always repel each other while unlike poles always attracts each other. Thus, we can say that P and Q are the magnets here. R is not a magnet, as when its both ends are brought near to magnet, its North pole remains stationary. For the magnet P, X is the north pole and Y is the south pole whereas for magnet Q, X is south pole and Y is north pole.
Magnets have a shape- a)cylindrical
- b)ball ended
- c)horse shoe
- d)all of these
Correct answer is option 'D'. Can you explain this answer?
Magnets have a shape
a)
cylindrical
b)
ball ended
c)
horse shoe
d)
all of these
|
Praveen Kumar answered |
Magnets come in various shapes, including cylindrical, ball-ended, and horseshoe shapes. Each shape has different applications depending on the use, but all of these are valid forms of magnets.
Thus, the correct answer is D: All of these.
Two magnets are placed in a container as shown in the figure by some external force. What would happen if the force on magnet P is removed?
- a)Magnet P will attract magnet Q.
- b)Magnet P will repel magnet Q.
- c)Both magnets will demagnetize each other.
- d)Both magnets will produce electric current.
Correct answer is option 'B'. Can you explain this answer?
Two magnets are placed in a container as shown in the figure by some external force. What would happen if the force on magnet P is removed?
a)
Magnet P will attract magnet Q.
b)
Magnet P will repel magnet Q.
c)
Both magnets will demagnetize each other.
d)
Both magnets will produce electric current.
|
Prashanth Saha answered |
Since like poles repel each other, magnet P will repel magnet Q.
Two bar magnets suspended by string, are separated by a piece of metal. Which of the following statements best explain the outcome shown in the diagram?
- a)Only like poles attract.
- b)The magnets have lost their magnetic forces.
- c)The metal exerts a magnetic field which attracts the magnets.
- d)The magnetic field of the magnets cannot pass through the metal.
Correct answer is option 'D'. Can you explain this answer?
Two bar magnets suspended by string, are separated by a piece of metal. Which of the following statements best explain the outcome shown in the diagram?
a)
Only like poles attract.
b)
The magnets have lost their magnetic forces.
c)
The metal exerts a magnetic field which attracts the magnets.
d)
The magnetic field of the magnets cannot pass through the metal.
|
Aarav Saha answered |
The effect of magnetic field cannot pass through any metal. Magnetic effects can pass through screens of substances such as plastic, paper, glass etc.
We can use a magnet to separate- a)Iron filings from sand
- b)Pieces of copper wire from glass beads
- c)copper staples from sand
- d)Rubber bands from pieces of aluminium foil
Correct answer is option 'A'. Can you explain this answer?
We can use a magnet to separate
a)
Iron filings from sand
b)
Pieces of copper wire from glass beads
c)
copper staples from sand
d)
Rubber bands from pieces of aluminium foil
|
|
Praveen Kumar answered |
A magnet can be used to separate iron filings from sand because iron is magnetic, while sand is not. The magnet will attract the iron filings and leave the non-magnetic sand behind.
Thus, the correct answer is A: Iron filings from sand.
Other options are incorrect because magnet does not attract copper or aluminium foil
Other options are incorrect because magnet does not attract copper or aluminium foil
A matchbox containing an unknown object is placed on a thin sheet of glass in the experimental set-up shown in the figure.
When the bar magnet moves, it is able to drag the match box along. What is most likely to be found in the matchbox?- a)Marble
- b)Toothpick
- c)Ten-cent coin
- d)Steel ball bearing
Correct answer is option 'D'. Can you explain this answer?
A matchbox containing an unknown object is placed on a thin sheet of glass in the experimental set-up shown in the figure.
When the bar magnet moves, it is able to drag the match box along. What is most likely to be found in the matchbox?
a)
Marble
b)
Toothpick
c)
Ten-cent coin
d)
Steel ball bearing
|
|
Dr Manju Sen answered |
- Marble (a) – Marbles are typically made of glass or ceramic, which are not magnetic.
- Toothpick (b) – Toothpicks are made of wood, which is also non-magnetic.
- Ten-cent coin (c) – Most ten-cent coins are made from non-magnetic metals such as copper, nickel, or aluminum, which are not strongly attracted to magnets.
- Steel ball bearing (d) – Steel contains iron, which is strongly attracted to magnets.
Since the matchbox moves when the magnet is brought near, the most likely object inside is the steel ball bearing (d).
In the given diagrams, compasses are used to plot the magnetic field around a bar magnet with poles marked N (North) and S (South). Which of the following diagrams correctly shows the expected field pattern?- a)
- b)
- c)
- d)
Correct answer is option 'D'. Can you explain this answer?
In the given diagrams, compasses are used to plot the magnetic field around a bar magnet with poles marked N (North) and S (South). Which of the following diagrams correctly shows the expected field pattern?
a)
b)
c)
d)
|
|
Praveen Kumar answered |
Magnetic field lines are directed from North Pole to South Pole outside the magnet and south pole to north pole inside the magnet.. So option (d) is correct.
Observe the given figure and identify the correct statements.
(i) Poles 1, 3 and 5 are unlike poles.
(ii) Poles 2, 4 and 6 are like poles.
(iii) Pole 1 will attract pole 3 and 5.
(iv) Pole 4 will be attracted by pole 1.- a)Only (i) and (iii)
- b)Only (ii) and (iv)
- c)Only (i) and (ii)
- d)Only (iii) and (iv)
Correct answer is option 'B'. Can you explain this answer?
Observe the given figure and identify the correct statements.
(i) Poles 1, 3 and 5 are unlike poles.
(ii) Poles 2, 4 and 6 are like poles.
(iii) Pole 1 will attract pole 3 and 5.
(iv) Pole 4 will be attracted by pole 1.
a)
Only (i) and (iii)
b)
Only (ii) and (iv)
c)
Only (i) and (ii)
d)
Only (iii) and (iv)
|
Sagnik Chatterjee answered |
Poles 1, 3 and 5 are like poles, so they will not attract each other. Similarly poles 2, 4 and 6 are like poles. Only unlike poles are attracted by each other.
What is the North Seeking Pole of a magnet?- a)South pole
- b)North pole
- c)West pole
- d)East pole
Correct answer is option 'B'. Can you explain this answer?
What is the North Seeking Pole of a magnet?
a)
South pole
b)
North pole
c)
West pole
d)
East pole
|
|
EduRev Class 6 answered |
Answer: B) North pole
The North Seeking Pole of a magnet is the pole that is attracted to the Earth's magnetic south pole, pointing towards the magnetic north.
The North Seeking Pole of a magnet is the pole that is attracted to the Earth's magnetic south pole, pointing towards the magnetic north.
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