One Mark Questions :

 1. Define magnetic field.

2. What is a magnetic compass?

3. Name the first person to study and record te properties of a magnet.

4. Write any two natural magnets and two artificial magnets.

5. What does the following picture indicate about the attraction of a magnet?

6. What do you mean by a magnet?

7. What is the difference between a temporary and a permanent magnet?

8. Why do we need magnetic keepers?

9. Name two magnetic substances.

10.What do you infer from the given picture?

11. How can you tell a particular substance is magnetic or non-magnetic?

12. What is a natural magnet?

13. What are permanent magnets made up of?

14. Describe an activity to show that magnetic effects can pass through non-magnetic materials.

15. Why freely suspended magnet comes to rest in north-south direction?

16. Draw a diagram to show that a freely suspended magnet shows N-S direction.

17. Complete the analogy.
(i) _______________ : attract : : North - North : Repel

(ii) Stainless steel : ______________ : : Iron : magnetic substance

18. What is magnetic compass?

19. What will happen if while making a magnet it is rubbed hazardously instead of rubbing in one direction?

20. Why magnets should be kept away from mobiles, TV & music system ?

21. i) State the characteristics of a magnet.
      ii) Why do we need magnetic keepers?

22. Under what conditions do magnets lose their magnetic property?

23. What do you mean by magnetism?

24. Classify the following substances as magnetic and non-magnetic:
               a) Brass        b)Stainless stell      c)Nickel     d)Cobalt

25. Differentiate between Natural and Artificial Magnet.

26. With the help of the given picture answer the following:(pg:182 pic:13.10)

27. Why does the needle always point in the same direction every time when the cork is rotated and allowed to float?

28.  What do you understand  by poles of the magnet?

29. What is natural magnet? How can you tell whether a particular substance is magnetic or non-magnetic?

30. What do you infer from the pictures given below :
            a) Pic 13.3 - Pg.No : 179
            b) Pic 13.2 - Pg. No : 178

31. Write the difference between a temporary and a permanant magnet.

32. Why does magnet attract iron fillings from the mixture of Sulphur and iron fillings but not from iron sulphide?

33.Do the poles of horse-shoe magnet attract each other?

34. What do you infer from the pictures given below :
a) Pic 13.5 - Pg.No : 179
b) Pic 13.2 - Pg. No : 178


35. List two applications of the attractive property of Magnet.