11. Which of the following is/are an example of magnetic substance?
(A) Iron
(B) Nickle
(C) Cobalt
(D) All of the above
12. The materials which are not attracted towards a magnet are called
(A) Magnetic
(B) Non magnetic
(C) Magnetite
(D) Poles
13. Which is a natural magnet?
(A) Bakelite
(B) Haematite
(C) Magnetite
(D) All of the above
14. A freely suspended bar magnet rests in
(A) South direction
(B) North direction
(C) East -west directions
(D) North-south directions
15. There is a maximum attraction in ……………of a magnet.
(A) north pole
(B) south pole
(C) both corners
(D) middle
16. ………..can destroy magnetic properties of a magnet.
(A) cold water
(B) hot water
(C) heat
(D) ice
17. The magnetic properties of a magnet cannot be destroyed by
(A) heating it
(B) cutting it
(C) hammering it
(D) None of the above
18. North pole and South pole of a magnet are called …………
(A) Magnetic poles
(B) North pole and south pole
(C) Both A and B
(D) None of the above
19. Magnet attract
(A) Paper and wood
(B) Wood and iron
(C) Plastic and paper
(D) Iron and cobalt
20. ……………..magnet retains its magnetic properties for a long period.
(A) Permanent magnet
(B) Temporary magnet
(C) Non-magnetic magnet
(D) None of the above
Answers:-
| 11.(D) 12.(B) 13.(C) 14.(D) 15.(D) 16.(C) 17. (B) 18.(A) 19.(D) 20.(A) |