A) \[\mathbf{\vec{M}\times \vec{B}}\]
B) \[\mathbf{\vec{M}}-\mathbf{\vec{B}}\]
C) \[\frac{1}{2}\mathbf{\vec{M}}\times \mathbf{\vec{B}}\]
D) \[\mathbf{\vec{M}}+\mathbf{\vec{B}}\]
Correct Answer: A
Solution :
Torque acting on the magnet is given by \[\overset{\to }{\mathop{\tau }}\,=\overset{\to }{\mathop{\mathbf{M}}}\,\times \overset{\to }{\mathop{\mathbf{B}}}\,\] Here, \[\overset{\to }{\mathop{\mathbf{M}}}\,\]magnetic moment, \[\overset{\to }{\mathop{\mathbf{B}}}\,=\]magnetic field,
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