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All questions of How Things Work for CTET & State TET Exam
Which type of magnet is naturally occurring?- a)Lodestone
- b)Bar magnet
- c)Electromagnet
- d)Ceramic magnet
Correct answer is option 'A'. Can you explain this answer?
a)
Lodestone
b)
Bar magnet
c)
Electromagnet
d)
Ceramic magnet
 | Torcia Education answered |
Lodestone is a naturally occurring magnet, whereas bar magnets, electromagnets, and ceramic magnets are man-made.
What happens to the poles of a magnet when it is broken into smaller pieces?- a)Each piece loses its magnetic properties
- b)Each piece retains both a North and a South Pole
- c)Each piece has only one pole
- d)The pieces become non-magnetic
Correct answer is option 'B'. Can you explain this answer?
a)
Each piece loses its magnetic properties
b)
Each piece retains both a North and a South Pole
c)
Each piece has only one pole
d)
The pieces become non-magnetic
 | Patel Hitesh answered |
The answer is B because when we broke the magnet into to pieces then it automatically the both the side convert into North and South
Two toy cars, each with a bar magnet fixed inside, are brought close. The cars push away from each other. What does this mean?- a)Cars are too heavy to move.
- b)Magnets inside are repelling (like poles face each other).
- c)Magnets inside are attracting (unlike poles face each other).
- d)Cars cannot be affected by magnets.
Correct answer is option 'B'. Can you explain this answer?
Two toy cars, each with a bar magnet fixed inside, are brought close. The cars push away from each other. What does this mean?
a)
Cars are too heavy to move.
b)
Magnets inside are repelling (like poles face each other).
c)
Magnets inside are attracting (unlike poles face each other).
d)
Cars cannot be affected by magnets.
 | Coders Trust answered |
Like poles (north-north or south-south) repel. Since the cars moved apart, their facing poles must be the same.
Which of the following materials is attracted to a magnet?- a)Wood
- b)Plastic
- c)Iron
- d)Glass
Correct answer is option 'C'. Can you explain this answer?
a)
Wood
b)
Plastic
c)
Iron
d)
Glass
 | Keystone Instructors answered |
Iron is a magnetic material and is attracted to magnets, while wood, plastic, and glass are non-magnetic materials.
Which poles of two magnets will attract each other?- a)North-North
- b)South-South
- c)North-South
- d)East-West
Correct answer is option 'C'. Can you explain this answer?
a)
North-North
b)
South-South
c)
North-South
d)
East-West
| | Keystone Instructors answered |
Opposite poles (North-South) of two magnets attract each other, while like poles repel each other.
How does a magnet help in navigation?- a)By showing temperature
- b)By pointing to the Earth's magnetic North Pole
- c)By measuring altitude
- d)By calculating speed
Correct answer is option 'B'. Can you explain this answer?
a)
By showing temperature
b)
By pointing to the Earth's magnetic North Pole
c)
By measuring altitude
d)
By calculating speed
 | Maya Deshpande answered |
Understanding Magnet Navigation
When it comes to navigation, magnets play a crucial role by pointing to the Earth's magnetic North Pole. Let's explore how this works.
How Magnets Work in Navigation
- **Earth's Magnetic Field**: The Earth acts like a giant magnet with a magnetic field that extends from the North Pole to the South Pole. This field influences magnetic materials, including compasses.
- **Compass Functionality**: A compass contains a small, lightweight magnet that is free to rotate. When the compass is held level, the magnet aligns itself with the Earth's magnetic field.
- **Pointing to Magnetic North**: The north end of the compass needle, which is magnetized, points towards the Earth's magnetic North Pole. This allows users to determine their direction relative to the north.
Importance of Magnetic North in Navigation
- **Orientation**: By knowing which way is north, travelers can orient themselves and navigate effectively. This is especially useful in unfamiliar territories.
- **Map Reading**: Navigators can use a map in conjunction with a compass to find their exact position and chart a course. Aligning the map with the compass ensures accurate navigation.
Conclusion
In summary, magnets are essential for navigation as they point to the Earth's magnetic North Pole. This ability to determine direction helps travelers, explorers, and adventurers find their way in various environments, making option 'B' the correct answer.
When it comes to navigation, magnets play a crucial role by pointing to the Earth's magnetic North Pole. Let's explore how this works.
How Magnets Work in Navigation
- **Earth's Magnetic Field**: The Earth acts like a giant magnet with a magnetic field that extends from the North Pole to the South Pole. This field influences magnetic materials, including compasses.
- **Compass Functionality**: A compass contains a small, lightweight magnet that is free to rotate. When the compass is held level, the magnet aligns itself with the Earth's magnetic field.
- **Pointing to Magnetic North**: The north end of the compass needle, which is magnetized, points towards the Earth's magnetic North Pole. This allows users to determine their direction relative to the north.
Importance of Magnetic North in Navigation
- **Orientation**: By knowing which way is north, travelers can orient themselves and navigate effectively. This is especially useful in unfamiliar territories.
- **Map Reading**: Navigators can use a map in conjunction with a compass to find their exact position and chart a course. Aligning the map with the compass ensures accurate navigation.
Conclusion
In summary, magnets are essential for navigation as they point to the Earth's magnetic North Pole. This ability to determine direction helps travelers, explorers, and adventurers find their way in various environments, making option 'B' the correct answer.
You sprinkle iron filings around different objects. They form patterns around a bar, a horseshoe, and a needle but not around a plastic ruler. What does this show?- a)Plastic is a strong magnet.
- b)Iron filings are non-magnetic.
- c)Only certain shapes of magnets work.
- d)Magnetic materials respond only to magnets, not plastics.
Correct answer is option 'D'. Can you explain this answer?
You sprinkle iron filings around different objects. They form patterns around a bar, a horseshoe, and a needle but not around a plastic ruler. What does this show?
a)
Plastic is a strong magnet.
b)
Iron filings are non-magnetic.
c)
Only certain shapes of magnets work.
d)
Magnetic materials respond only to magnets, not plastics.
 | Anjali Sharma answered |
Understanding Magnetic Materials
When iron filings are sprinkled around different objects, they reveal important information about magnetism and materials. Here’s what the observations indicate:
Response to Magnetic Fields
- Iron filings are made of ferromagnetic material, which means they can be magnetized and will align with magnetic fields.
- When placed around a bar magnet, horseshoe magnet, or a needle, the iron filings align themselves along the magnetic field lines, forming visible patterns.
Why No Pattern Around Plastic
- Plastic is a non-magnetic material. It does not have the properties to be magnetized or influence the alignment of iron filings.
- Since plastic does not produce a magnetic field, the iron filings do not respond to it, hence no patterns are formed.
Conclusion: Magnetic vs. Non-Magnetic
- This experiment highlights that only materials that possess magnetic properties can interact with magnets and respond to magnetic fields.
- Therefore, the correct conclusion from the experiment is option 'D': Magnetic materials respond only to magnets, not plastics.
Key Takeaway
- Understanding the difference between magnetic and non-magnetic materials helps us identify how they interact with magnetic fields, showcasing the unique properties of ferromagnetic substances like iron.
When iron filings are sprinkled around different objects, they reveal important information about magnetism and materials. Here’s what the observations indicate:
Response to Magnetic Fields
- Iron filings are made of ferromagnetic material, which means they can be magnetized and will align with magnetic fields.
- When placed around a bar magnet, horseshoe magnet, or a needle, the iron filings align themselves along the magnetic field lines, forming visible patterns.
Why No Pattern Around Plastic
- Plastic is a non-magnetic material. It does not have the properties to be magnetized or influence the alignment of iron filings.
- Since plastic does not produce a magnetic field, the iron filings do not respond to it, hence no patterns are formed.
Conclusion: Magnetic vs. Non-Magnetic
- This experiment highlights that only materials that possess magnetic properties can interact with magnets and respond to magnetic fields.
- Therefore, the correct conclusion from the experiment is option 'D': Magnetic materials respond only to magnets, not plastics.
Key Takeaway
- Understanding the difference between magnetic and non-magnetic materials helps us identify how they interact with magnetic fields, showcasing the unique properties of ferromagnetic substances like iron.
You break a bar magnet into two equal pieces. Which of the following is true?- a)Each piece will have only a north pole.
- b)Each piece will have only a south pole.
- c)Each piece will have both north and south poles.
- d)The broken pieces will lose magnetism completely.
Correct answer is option 'C'. Can you explain this answer?
You break a bar magnet into two equal pieces. Which of the following is true?
a)
Each piece will have only a north pole.
b)
Each piece will have only a south pole.
c)
Each piece will have both north and south poles.
d)
The broken pieces will lose magnetism completely.
| | Mihir Menon answered |
Understanding Magnetism in Bar Magnets
When a bar magnet is broken into two equal pieces, each piece retains its magnetic properties. Here's a detailed explanation:
Magnetic Poles in Bar Magnets
- A bar magnet has two poles: the north pole and the south pole.
- These poles are essential for the magnet's ability to attract or repel other magnetic materials.
Breaking the Magnet
- When the bar magnet is broken into two equal halves:
- Each half retains its magnetic orientation.
- Each piece will develop its own north and south poles.
Resulting Poles in Each Piece
- After breaking:
- Each piece will have both a north pole and a south pole.
- This is due to the nature of magnetic domains within the material, which rearrange to form new poles.
Why Other Options are Incorrect
- Option a: Each piece will have only a north pole.
- Incorrect because each piece must have a south pole as well.
- Option b: Each piece will have only a south pole.
- Incorrect for the same reason as option a; both poles are present.
- Option d: The broken pieces will lose magnetism completely.
- Incorrect since the pieces remain magnetic and retain their properties.
Conclusion
- Thus, when a bar magnet is broken, each piece will indeed have both a north and a south pole, making option 'C' the correct answer. Each segment remains a functional magnet, demonstrating the fundamental characteristic of magnetic materials.
When a bar magnet is broken into two equal pieces, each piece retains its magnetic properties. Here's a detailed explanation:
Magnetic Poles in Bar Magnets
- A bar magnet has two poles: the north pole and the south pole.
- These poles are essential for the magnet's ability to attract or repel other magnetic materials.
Breaking the Magnet
- When the bar magnet is broken into two equal halves:
- Each half retains its magnetic orientation.
- Each piece will develop its own north and south poles.
Resulting Poles in Each Piece
- After breaking:
- Each piece will have both a north pole and a south pole.
- This is due to the nature of magnetic domains within the material, which rearrange to form new poles.
Why Other Options are Incorrect
- Option a: Each piece will have only a north pole.
- Incorrect because each piece must have a south pole as well.
- Option b: Each piece will have only a south pole.
- Incorrect for the same reason as option a; both poles are present.
- Option d: The broken pieces will lose magnetism completely.
- Incorrect since the pieces remain magnetic and retain their properties.
Conclusion
- Thus, when a bar magnet is broken, each piece will indeed have both a north and a south pole, making option 'C' the correct answer. Each segment remains a functional magnet, demonstrating the fundamental characteristic of magnetic materials.
What is the primary property of a freely suspended magnet?- a)It rotates continuously
- b)It aligns itself along the north-south direction
- c)It loses its magnetic properties
- d)It points towards the East
Correct answer is option 'B'. Can you explain this answer?
a)
It rotates continuously
b)
It aligns itself along the north-south direction
c)
It loses its magnetic properties
d)
It points towards the East
| | Torcia Education answered |
A freely suspended magnet aligns itself along the north-south direction due to the Earth's magnetic field.
Which action will make a magnet lose its magnetism?- a)Stroking a needle with a magnet.
- b)Heating, hammering, or dropping it.
- c)Storing with opposite poles together.
- d)Keeping with soft iron pieces.
Correct answer is option 'B'. Can you explain this answer?
Which action will make a magnet lose its magnetism?
a)
Stroking a needle with a magnet.
b)
Heating, hammering, or dropping it.
c)
Storing with opposite poles together.
d)
Keeping with soft iron pieces.
| | Coders Trust answered |
Magnets lose their strength if heated, hammered, or dropped. Proper storage with opposite poles and soft iron keeps them safe.
Fill in the blanks with most appropriate option. Although a number of objects, such as kites, birds, aeroplanes move in space, but their shadow is not seen on the earth. This is due to the reason that the
(i), the region of complete (ii) is not able to reach the earth. The region of partial (iii), that is the (iv) reaching the earth is too large and too faint to be visible to us.
- a)
- b)
- c)
- d)
Correct answer is option 'C'. Can you explain this answer??
Fill in the blanks with most appropriate option. Although a number of objects, such as kites, birds, aeroplanes move in space, but their shadow is not seen on the earth. This is due to the reason that the
(i), the region of complete (ii) is not able to reach the earth. The region of partial (iii), that is the (iv) reaching the earth is too large and too faint to be visible to us.
a)
b)
c)
d)
 | Zachary Foster answered |
The passage says:
- “…the (i), the region of complete (ii) is not able to reach the earth.”
- The region of complete shadow is called Umbra.
- In Umbra there is complete Darkness.
- So (i) = Umbra, (ii) = Darkness.
- “…The region of partial (iii), that is the (iv) reaching the earth is too large and too faint to be visible to us.”
- The region of partial shadow is called Penumbra.
- In this region, light is not fully blocked, so there is some Brightness.
- So (iii) = Brightness, (iv) = Penumbra.
Thus the correctly filled passage becomes:
"Although a number of objects, such as kites, birds, aeroplanes move in space, but their shadow is not seen on the earth. This is due to the reason that the Umbra, the region of complete Darkness is not able to reach the earth. The region of partial Brightness, that is the Penumbra reaching the earth is too large and too faint to be visible to us."
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