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AB and CD are fixed conducting smooth ra...

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

A

The rod `PQ` may move downward with constant acceleration

B

The rod `PQ` may move upward with constant acceleration

C

The rod will move downward with decreasing acceleration and finally acquire a constant speed

D

either `A` and `B`

Text Solution

Verified by Experts

The correct Answer is:
D
It the magnitude of `l_(A)` is very large such that force due to magnetic field on `PQ` exceeds its weight then it will move upwards otherwise it will move downwards.
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RESONANCE ENGLISH-ELECTROMAGNETIC INDUCTION-Exercis-1 PART 2
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