Magnetic field due to currentHard
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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