Question
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.