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AB and CD are fixed conducting smooth ra...

`AB` and `CD` are fixed conducting smooth rails placed in a vertical plane and joined by a constant current source at its upper end. `PQ` is a conducting rod which is free to slide on the rails. A horizontal uniform magnetic field exists in space as shown in figure. If the rod `PQ` is released from rest then,

A

The rod PQ may move downward with ocnstant acceleration

B

The rod PQ may move upward with constant acceleration

C

The rod wil move downward with decreasing acceleration and finally acquire a constant velocity

D

either a or b

Text Solution

Verified by Experts

The correct Answer is:
D
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