A) \[\tau =niAB\,\cos \theta \]
B) \[\tau =niAB\,\sin \theta \]
C) \[\tau =niAB\,\]
D) None of the above, since the magnetic field is radial.
Correct Answer: A
Solution :
[a] Plane of coil is having angle 6 with the magnetic field. \[\therefore \,\,\,\,\tau =MB\,\sin ({{90}^{o}}-\theta )\] or \[\tau =niAB\,\cos \,\theta \] (As M=niA)You need to login to perform this action.
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