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Olympiad Test: Fun With Magnets


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20 Questions MCQ Test Science & Technology for UPSC CSE | Olympiad Test: Fun With Magnets

Olympiad Test: Fun With Magnets for Class 6 2022 is part of Science & Technology for UPSC CSE preparation. The Olympiad Test: Fun With Magnets questions and answers have been prepared according to the Class 6 exam syllabus.The Olympiad Test: Fun With Magnets MCQs are made for Class 6 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Olympiad Test: Fun With Magnets below.
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Olympiad Test: Fun With Magnets - Question 1

When a magnet is suspended freely it always aligns itself in _______ direction?

Detailed Solution for Olympiad Test: Fun With Magnets - Question 1

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.

Olympiad Test: Fun With Magnets - Question 2

_______ is the only natural magnet.

Detailed Solution for Olympiad Test: Fun With Magnets - Question 2

A natural magnet is a magnet that occurs naturally in nature. All natural magnets are permanent magnets, meaning they will never lose their magnetic power. Natural magnets can be found in sandy deposits in various parts of the world. The strongest natural magnet material is lodestone, also called magnetite.

Olympiad Test: Fun With Magnets - Question 3

Which of the following cannot be used to make a magnet?

Detailed Solution for Olympiad Test: Fun With Magnets - Question 3

Iron, cobalt and steel are ferromagnetic materials which can be used to make magnet but ebonite cannot be used to make magnets.

Olympiad Test: Fun With Magnets - Question 4

Which of the following is not a non- magnetic substance?

Detailed Solution for Olympiad Test: Fun With Magnets - Question 4

Iron, cobalt and nickel are magnetic materials.

Olympiad Test: Fun With Magnets - Question 5

Which of the following gets attracted to a magnet?

Detailed Solution for Olympiad Test: Fun With Magnets - Question 5

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.

Olympiad Test: Fun With Magnets - Question 6

When a magnet is placed on a plastic plate with common pins spread on it, then _____

Detailed Solution for Olympiad Test: Fun With Magnets - Question 6

The poles of the magnet has more attraction of magnetic force. That is why pins stick ends of the magnet.

Olympiad Test: Fun With Magnets - Question 7

The North end of the freely suspended magnet points towards _____?

Detailed Solution for Olympiad Test: Fun With Magnets - Question 7

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.

Olympiad Test: Fun With Magnets - Question 8

The south pole of the freely suspended magnet points towards ______?

Detailed Solution for Olympiad Test: Fun With Magnets - Question 8

The earth behaves as a magnetic dipole . Therefore a freely suspended magnet always points towards in the north-south direction because the south pole of the suspended magnet attracts the north pole of the earth's magnet which is the geographical south pole of the earth.

Olympiad Test: Fun With Magnets - Question 9

Like poles of magnets ______ each other.

Detailed Solution for Olympiad Test: Fun With Magnets - Question 9

Like poles of two magnets repel each other, The force between them is non contact force and magnetic force.

Olympiad Test: Fun With Magnets - Question 10

Unlike poles of magnets _____ each other.

Detailed Solution for Olympiad Test: Fun With Magnets - Question 10

Unlike poles of different magnets attract each other; like poles repel each other.

Olympiad Test: Fun With Magnets - Question 11

______ is the surest test of magnetism.

Detailed Solution for Olympiad Test: Fun With Magnets - Question 11

Repulsion is the surest test for magnetism.

Only magnets possess the repulsive characteristics, whereas any magnetic substance (like iron) has attractive characteristics.

Olympiad Test: Fun With Magnets - Question 12

When a N pole of a bar magnet is brought near the north pole of a freely suspended magnetic needle, then it -----------?

Detailed Solution for Olympiad Test: Fun With Magnets - Question 12

If the north (N pole) of a bar magnet is brought near the N pole of another suspended magnet, the suspended magnet moves away.  Repulsion also occurs when two south poles (S poles) are brought near each other. 

Olympiad Test: Fun With Magnets - Question 13

When a South pole a magnet is brought near the N pole of a freely suspended magnetic needle, then it __________?

Olympiad Test: Fun With Magnets - Question 14

______  is a device used by pilots and navigators used to find the direction.

Detailed Solution for Olympiad Test: Fun With Magnets - Question 14

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.

Olympiad Test: Fun With Magnets - Question 15

Magnetism of a magnet is lost by doing which of the following acts

Detailed Solution for Olympiad Test: Fun With Magnets - Question 15

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.

Olympiad Test: Fun With Magnets - Question 16

Which of the following gets demagnetised when a powerful magnet is kept near it

Detailed Solution for Olympiad Test: Fun With Magnets - Question 16

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.

Olympiad Test: Fun With Magnets - Question 17

Which of the following does not get demagnetised when a powerful magnet is kept near it

Detailed Solution for Olympiad Test: Fun With Magnets - Question 17

The correct answer is D as COMB does not get demagnetised when a powerful magnet is kept near it

Olympiad Test: Fun With Magnets - Question 18

Electric bell is an example of  ______ magnet.

Detailed Solution for Olympiad Test: Fun With Magnets - Question 18

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.

Olympiad Test: Fun With Magnets - Question 19

______ is a type of magnet which is used in cranes to lift heavy containers from ships.

Detailed Solution for Olympiad Test: Fun With Magnets - Question 19

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.

Olympiad Test: Fun With Magnets - Question 20

Magnetism in material is due to

Detailed Solution for Olympiad Test: Fun With Magnets - Question 20

Magnetic fields are produced by moving electric charges. Everything is made up of atoms, and each atom has a nucleus made of neutrons and protons with electrons that orbit around the nucleus. Since the orbiting electrons ≠are tiny moving charges, a small magnetic field is created around each atom.

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