Home › JEE Advanced › Physics › Electromagnetism › Torque on a current loop (moment m) in uniform f…
Torque 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.
Related questions
Certain galvanometers use eddy currents to provide electromagnetic:The SI unit of inductance is the:Eddy current flow patterns are said to resemble swirling eddies in:Foucault lived from 1819 until:Who discovered eddy currents?Swirling induced currents in a metal plate are called:What in Faraday's equation represents Lenz's law?Lenz's law says the induced current opposes the change in: