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Question: The figure shows a wire sliding on two parallel conducting rails placed at a separation *I.* A magne...

The figure shows a wire sliding on two parallel conducting rails placed at a separation I. A magnetic field B exists in a direction perpendicular to the plane of the rails. The force required to keep the wire moving at a constant velocity v will be

A

evB

B

evA

C

Blv

D

Zero

Answer

Zero

Explanation

Solution

No change in flux hence no force required.