A metal rod of length l cuts across a uniform magnetic field B with a velocity v. If the resistance of the circuit of which the rod forms a part is r, then the force required to move the rod is

Options

(a) B²l²v/r
(b) Blv/r
(c) B²lv/r
(d) B²l²v²/r

Correct Answer:

B²l²v/r

Explanation:

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