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A 0.1 m long conductor carrying a curren...

A 0.1 m long conductor carrying a current of 50 A is held perpendicular to a magnetic field of 1.25 mT. The mechanical power required to move the conductor with a speed of `1ms^(-1)` is

A

a) 62.5m W

B

b) 625 mW

C

c) 6.25 mW

D

d) 12.5 mW

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