Magnet

Q. Both gravitational and magnetic forces are attractive and repulsive in nature.

1. True
2. False

Q. Repulsion is the surest test for magnetism.

1. True
2. False

Q. Soft iron pieces are placed across the ends of bar magnet when stored. What are such pieces called?

1. Magnetic preservatives
2. Magnetic keepers
3. Magnetic refractors
4. Magnetic reflectors

Q.

Question 2

The arrangement to store two magnets is shown by figures (a), (b), (c) and (d). Which one of them is the correct arrangement?

Q.

Attraction is a sure test for magnetism.

1. True
2. False

Q. Select the best way to store 2 bar magnets so they don't become weak with the passage of time.

1. 
2. 
3. 
4. 

Q.

Give a reason for the following;

• Repulsion is the sure test for magnetism.

Q.

Soft iron pieces are placed across the ends of bar magnets when stored. What are such pieces called?

1. Preservatives

2. Keepers

3. Compasses

4. Poles

Q.

.................. is the surest test of magnetism.

Q. _________ is a non-contact force.

1. Frictional force
2. Magnetic force
3. Tension force
4. Normal force

Q.

Pivoting of the compass needle on a sharp pin enable it to ___ .

1. get magnetised

2. get demagnetised

3. move freely

4. create friction

Q. Bar magnets should be stored .

1. in pairs
2. in water
3. in cold place
4. under UV rays.

Q.

If a magnet shows attraction between unlike poles and repulsion between like poles, then why is repulsion the only surest test of magnetism? Explain.

Q.

Which of the following is the surest test of magnetism?

1. Attraction

2. Repulsion

3. Breaking a magnet