A) \[90{}^\circ \] to the direction of field
B) \[0{}^\circ \] to the direction of field
C) \[45{}^\circ \]to the direction of field
D) \[135{}^\circ \] to the direction of field
Correct Answer: B
Solution :
(b) \[0{}^\circ \] to the direction of field. A stable equilibrium is when the net torque on the loop is minimum. It is when the magnetic moment of the loop is along the direction of field. i. e., \[\theta =0{}^\circ \] \[\Rightarrow \tau =MB\,\sin \theta =MB\,\sin 0{}^\circ =0\].You need to login to perform this action.
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