alleryTorque on a current loop (moment m) in uniform field B:
Am + B
Bm × B (magnitude m B sin theta)
Cm B
Dm / B
Answer & Solution
Correct answer: B. m × B (magnitude m B sin theta)
τ = m × B. Magnitude τ = mB sin theta.
Maximum when m is perpendicular to B
zero when parallel/antiparallel.
This is the basis of electric motors.
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