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Magnetism

Description: Magnetism
Number of Questions: 15
Created by:
Tags: Magnetism Fundamentals of Magnetism Electro-Magnetism
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Choose the correct option.

  1. Attraction precedes induction in magnetism.

  2. Induction precedes repulsion in magnetism.

  3. Iinduction precedes attraction in magnetism.

  4. All are incorrect


Correct Option: C

Pick the odd one out.

  1. Pencil

  2. Coin

  3. Spanner

  4. Pin


Correct Option: A
Explanation:

Pencil is odd one out as it is non-magnetic.

Pick the odd one out.

  1. Pencil

  2. Tooth brush

  3. Nail

  4. Leather


Correct Option: C
Explanation:

Nail is odd one out as it is magnetic.

Pick the odd one out.

  1. Iron

  2. Zinc

  3. Cobalt

  4. Nickel


Correct Option: B
Explanation:

Zinc does not show magnetic properties but the rest of them do show.

Which of the following statements is false?

  1. An object which attracts other objects made of magnetic materials is called a magnet.

  2. All magnets are made of iron.

  3. Magnets do not attract stainless steel.

  4. A magnet has two poles.


Correct Option: B
Explanation:

Because all magnets are not made of iron, some are made of alloy of aluminium, nickel and cobalt.

When a bar magnet is suspended, it always points in the __________ direction.

  1. North-East

  2. South-West

  3. North-South

  4. East-West


Correct Option: C

Which of the following statements is not true?

  1. A magnet created by an electric current is called a diamagnet.

  2. Repulsion is a sure test for magnetism than attraction.

  3. Permanent magnets tend to lose its magnetism gradually, if the poles are left open.

  4. A compass uses the directional property of a permanent magnet.


Correct Option: A

Magnetism was first discovered in ________.

  1. Italy

  2. France

  3. India

  4. Greece


Correct Option: D

Which of the following, best describes the field due to a magnet?

  1. Two regions near to the poles

  2. Region lying between the poles

  3. Region where its effect can be felt

  4. Region where it aligns itself along the North-South direction


Correct Option: C

Which of the following can be used as a magnetic keeper?

  1. Stainless steel

  2. Iron

  3. Alnico

  4. Wood


Correct Option: B

Permanent magnets can be damaged by which of the following?

  1. Exposure to heat

  2. Hammering

  3. Dropping form a height

  4. All of these


Correct Option: D

Which of the following statements is not true?

  1. When a piece of magnetic material comes close to a magnet, temporary magnetic poles are created at its end.

  2. The region around a magnet where its effects can be felt, is called the magnetic pole.

  3. Like poles repel and unlike poles attract.

  4. A bar magnet when suspended comes to rest along the North - South direction.


Correct Option: B

Pick the odd one out.

  1. Pin holders

  2. Magnetic stickers

  3. Magnetic door closers

  4. Magnetic compass


Correct Option: D
Explanation:

Magnetic compass uses the directional property of magnet whereas the rest use the attractive property of magnet.

Which of the following is not true about an electromagnet?

  1. This type of magnet is made by using an electric current.

  2. The core of an electromagnet is made of iron.

  3. They are used in electric bells.

  4. An electromagnet is a permanent magnet.


Correct Option: D
Explanation:

Electromagnet is not a permanent magnet. The magnetism is not retained once the current is switched off.

Which of the following materials is best suited as the core of an electromagnet?

  1. Steel

  2. Alnico

  3. Magnetite

  4. Iron


Correct Option: D
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