Permanent magnetismEasy
Question
If the magnet of length 10 cm and pole strength 40 Am is placed at an angle of 45o in an uniform magnetic field of 2 × 10-4 T. The couple acting on it will be :-
Options
A.0.656 × 10-5 N-m
B.0.656 × 10-4 N-m
C.0.5656 × 10-4 N-m
D.0.5656 × 10-3 N-m
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