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Question

Consider a metal ball of radius r moving at a constant velocity v in a uniform magnetic field of induction B. Assuming that the direction of velocity forms an angle α with the direction of B, the maximum potential difference between points on the ball is

A
rB|v|sinα
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B
B|v|sinα
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C
2rB|v|sinα
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D
2rB|v|cosα
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