A) \[\frac{mg}{IL}\sin \theta \]
B) \[\frac{mg}{IL}\cos \theta \]
C) \[\frac{mg}{IL}\tan \theta \]
D) \[\frac{mg}{IL}\sec \theta \]
Correct Answer: C
Solution :
As the conductor is moving with constant velocity net force acting on it must be zero. forces acting on conductor are magnetic force, gravity force & contact force as shown. For dynamic equilibrium ,\[mg\sin \theta =lBl\cos \theta \]\[\Rightarrow \]\[B=\frac{mg\tan \theta }{lL}\]You need to login to perform this action.
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