Question

B. Short/Long Answer Questions :
1. What is a magnet?

2. What are magnetic and non-magnetic substances ?
Give two examples of each.

3. What are natural and artificial magnets?

4. How is an artificial magnet prepared from a
natural magnet?

5. State two ways of magnetising an iron piece

6. How can magnetic properties of a magnet be
destroyed ?

7. Why does a freely suspended magnet always rest
in north-south direction ?

8. Draw diagrams of artificial magnets of four
different shapes

9. Why are artificial magnets preferred over the
natural magnets?

10. Describe an experiment to show that the
maximum attractive property is at the poles of
a magnet.

11. State four important properties of a bar magnet.

12. Explain the attractive property of a magnet with
the help of an experiment.

13. Describe a method by which an iron bar can be
made a magnet.

14. How are the magnets kept safely ? What is the
role of keepers in storing magnets ?

15. Define the term magnetic field of a magnet.
How will you recognise it experimentally ?

16. How will you make an iron bar electromagnet ?
Draw a diagram showing the polarities of an
electromagnet.

17. State two ways of increasing the strength of an
electromagnet.

18. Suppose you are given a long bar magnet and
you are asked to break it into four small magnets. Draw diagrams showing the polarities of each broken
part.

19. State three important uses of a magnet.

20. What is magnetic induction ? Explain with the
help of a diagram.

21. In which direction does a suspended bar magnet
come to rest ? Give reason.

22. State three differences between temporary and
permanent magnets.

23. State three ways of demagnetising a magnet.

24. Suggest one way to recognise the magnetic field
of the earth.

25. Name the material of core of an electromagnet
for (a) temporary magnet (b) permanent magnet.

26. You are given an iron nail, a torch cell and a
long piece of insulated copper wire. With the
help of a labelled neat diagram, describe in steps
how you will make the nail, an electromagnet.

27. Describe an experiment to illustrate that like
poles repel while unlike poles attract.

28. What are magnetic keepers ? Name its material.

29. How are the north and south poles of a magnet
located ? Explain.​

Answer 1

25. Name the material of core of an electromagnet

for (a) temporary magnet (b) permanent magnet.

26. You are given an iron nail, a torch cell and a

long piece of insulated copper wire. With the

help of a labelled neat diagram, describe in steps

how you will make the nail, an electromagnet.

27. Describe an experiment to illustrate that like

poles repel while unlike poles attract.

28. What are magnetic keepers ? Name its material.

29. How are the north and south poles of a magnet

located ? Explain.Explanation:

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Answer 2

Magnet is a object that can produce magnetic field.

Three methods of making magnets:

• Single touch method
• Double touch method
• Using electric current.