Fun with magnets Worksheet-1

Fun with magnets Worksheet-1

Multiple-Choice question:

1. Who among the following used lodestone for navigation in sea (compass)?

(a) The Japanese, about 4000 years ago

(b) The Chinese, about 3000 years ago

(c) The Swedish, about 5000 years ago

(d) The Dutch, about 2500 years ago

2. Which of the following statements is not true about poles of a magnet?

(a) North pole of a magnet is attracted towards south pole of other magnet.

(b) North poles of two magnets repel each other.

(c) Each magnet has a north and a south pole.

(d) A magnet can have two north poles

3. Poles of a magnet are the points inside a magnet where magnetic effects (attraction or repulsion) is:

(a) strongest        (b) weakest         (c) non-existent  (d) same

4. When iron fillings are kept near a magnet, _______

(a) It aligns itself along magnetic field lines

(b) It gets attracted towards north pole of magnet

(c) It gets attracted towards south pole of magnet

(d) Nothing happens

5. Which of the following is true about magnetism?

(a) When we cut a magnet in two parts, magnetism is lost

(b) When we cut a magnet in two parts, we get isolated north and south pole

(c)  When we cut a magnet in two parts, we get two magnets each with north and south pole

(d) We cannot cut a magnet in two parts

6. Needle of a compass, if free to move will always orient _________

(a) In geographical north-south direction

(b) In geographical east-west direction

(c) Along equator

(d) In any arbitrary direction

7. A magnetic compass can be used to navigate ______

(a) During any time of the day

(b) Only after sunrise and before sunset

(c) Only before sunrise and after sunset

(d) None of these

8. Which material can be made magnetic by hammering it with another magnet?

(a) Glass rod                                     (b) Copper wire

(c) Iron nail                                      (d) Lead tube

9. Which of the following two metals would be attracted to a magnet?

(a) Gold and silver                           (b) Silver and copper

(c) Iron and lead                              (d) Iron and nickel

10. Temporary magnets are made from _______.

(a) silver              (b) soft iron         (c) steel                (d) copper

Answer Key:

1. (b)
2. (d)
3. (a)
4. (a)
5. (c)
6. (a)
7. (a)
8. (c)
9. (d)
10. (b)