Practice question

MCQ

Question

When a bar magnet of magnetic moment \(\vec{M}\) is placed in a magnetic field \(\vec{B}\), then the torque exerted on the magnet will be:

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\(\vec{M}.\vec{B}\) \(-\vec{M}.\vec{B}\) \(\vec{M}\times\vec{B}\) Correct \(\vec{B}\times\vec{M}\)

Explanation

Torque τ=M×B, magnitude MB sinθ, direction perpendicular to plane of M and B.

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