Ch 14 Lesson 40 Properties of Magnet

Which of the following statements is incorrect?

• Magnetic force of attraction is maximum at poles

• Magnetic influence can be passed through woods

• Unlike poles repel and like poles attract

• Magnetic poles exist in pairs

Magnets can be demagnetized when _______

• they are placed side by side with unlike poles facing each other

• they are separated a piece of wood in between

• are heated to a very high temperature

• all of these

Which of the following is a non-magnetic material?

• copper

• cobalt

• iron

• nickel

What should a compass needle made of?

• copper

• steel

• wood

• plastic

Which of the following property is the sure test of magnetism?

• Attraction

• repulsion

• both attraction and repulsion

• none of the options

Spread some iron filings and place a bar magnet in it, the iron filings will ________

• cling to one end only

• spread uniformly over the magnet

• cling to each end of the magnet mostly and few near middle

• cling to the centre

________ is the property of a magnet to attract the magnetic materials towards itself.

• the attractive property

• the directive property

• the repulsive property

• the demagnetisation property

________ is the property of a magnet in which like magnetic poles repel and unlike magnetic poles attracts each other.

• the attractive property

• the directive property

• the repulsive property

• the demagnetisation property

________ is the property of a magnet in which a freely suspended magnet always points in a north-south direction.

• the attractive property

• the directive property

• the repulsive property

• the demagnetisation property

True or False: The magnetic force is maximum or strongest at the poles

(a)