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A vertical ring of radius r and resistan...

A vertical ring of radius `r` and resistance `R` slips vertically between two frictionless and resistanceless vertical rails. The rails which are joined at top. There is a uniform magnetic field of magnitude `B` perpendicular to plane of the ring and the rails. When speed of ring is `v`, the current in the section `PQ` is

A

zero

B

`(2Brv)/R`

C

`(4Brv)/R`

D

`(8Brv)/R`

Text Solution

Verified by Experts

The correct Answer is:
D
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