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A 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.
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