alleryThe torque on a magnetic dipole of moment m placed in uniform external field B is
Aτ = m · B
Bτ = m × B
Cτ = m + B
Dτ = m / B
Answer & Solution
Correct answer: B. τ = m × B
τ = m × B; magnitude mB sinθ, perpendicular to both m and B. This is analogous to τ = p × E in electrostatics.
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