21. When a bar magnet is brought near iron dust , most of the dust sticks
(A) near two ends
(B) near centre
(C) at the middle end
(D) None of the above
22. Attraction is seen between the poles of the two bar magnets in case of
(A) North pole of one magnet and north pole of the other
(B) North pole of one magnet and south pole of the other
(C) South pole of one magnet and south pole of the other
(D) None of the above is correct
23. Natural magnet
(A) Ferrite
(B) Pyrrhotite
(C) Lodestone
(D) All of the above
24. North pole of a magnet can be identified by ……………..
(A) Another magnet having its poles marked as North pole and South pole.
(B) Another magnet no matter whether the poles are marked or not
(C) Another magnet having its poles marked as South pole only
(D) None of the above
Answers:-
21.(A) 22.(B) 23.(D) 24.(A) 25.(B)