MCQ Questions

Q1

What happens when we hit a magnet with a hammer?

1. The north and south poles change positions
2. It gains more magnetic force
3. It demagnetises
4. Nothing happens

Answer:

By hammering a magnet we are actually trying to change the orientation of magnetic property of material which are making them magnet . If the alignment of magnetic property of material get change it would not work as magnet.

So, the correct answer is (c) - It demagnetises

Q2

The electromagnet is a 

1. Bar magnet
2. Permanent magnet
3. Temporary magnet
4. Damaged magnet

Answer:

Electromagnets behave as a magnet only when electric current flows through them. So, they are temporary magnets.

The correct answer is (c) Temporary magnet.

Q3

The magnets which lose their property of magnetism after a short period of time are called

1. Permanent magnets
2. Natural magnets
3. Temporary magnets
4. Artificial magnets

Answer: 

The correct answer is (c) - Temporary magnets.

Q4

Which of the following can be converted into magnet?

1. Iron
2. Wood
3. Stone
4. Clay

Answer: 

The correct answer is (a) - Iron.

Q5

Attraction is maximum at the………

1. Centre
2. Poles
3. Both (A) and (B)
4. None of these

Answer:

The magnetic force of attraction is greater where the field lines are crowded . Since all the magnetic fields lines emerge from the poles so the crowd or concentration or density of field lines is maximum near poles.  

The correct answer is (b) - Poles.