Page 83 - Science Class 6 Times Publication

c. Like poles of magnets repel each other but the unlike
poles attract.
d. The magnetic force is strong at the poles and weak in
the middle.

e. The magnetic poles always exist in pair.
7. Repulsion is the sure test for magnetism.

Exercise

1. Choose the best alternative in each case:

a. Natural magnet
i. Bar magnet ii. Lodestone
iii. Magnetite iv. Both ii and iii

b. Which of the following is not a magnetic substance?

i. Iron ii. Copper
iii. Nickel iv. Cobalt

c. Which of the following sentences is incorrect?
i. A magnet attracts magnetic substances.

ii. A freely suspended magnet comes to rest showing north
and south directions.
iii. A magnet produces current in a conducting wire.
iv. Like poles of magnet repel and unlike poles attract.

d. Which is the sure test for magnetism?

i. Attraction ii. Strength
iii. Repulsion iv. Induction

e. Where is a magnet used?

i. Computer ii. Radio
iii. Television iv. All of these

2. Answer these questions in very short:

a. What is a magnet?
b. What is a loadstone?

Times' Crucial Science and Environment 79 Book 6