alleryA rod of length L moves with velocity v perpendicular to magnetic field B. Motional EMF:
ABL²v
BBL/v
CBLv
DB²Lv
Answer & Solution
Correct answer: C. BLv
EMF = BLv (motional EMF, derived from F = qv × B on charges in the rod).
Used in generators, rail guns.
Independent of resistance of the rod itself.
Keep practising Electromagnetic Induction
Browse all Electromagnetic Induction questions for JEE Advanced, or explore more Physics topics.
Related questions
Faraday + Lenz — true or false?Inductive reactance increases linearly with frequency. At f = 50 Hz, X_L = 100 Ω. At f = 2Phase difference between voltage and current in pure capacitor in AC:For an AC generator with EMF ε(t) = ε₀ sin(ωt), the RMS EMF:In AC circuit with only inductor, average power consumed over one full cycle:A capacitor C in series with inductor L (LC circuit) oscillates with frequency:In an LR circuit with V = 12 V, R = 4 Ω, L = 2 H, current after t = 0.5 s:Energy density of magnetic field B in vacuum: