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A thin wire of length L is connected to ...

A thin wire of length `L` is connected to two adjacent fixed points and carries a current `I` in the clockwise direction , as shown in the figure. When the system is put in a uniform magnetic field of strength `B` going into the plane of the paper , the wire takes the shape of a circle . The tension in the wire is

A

`IBL`

B

`(IBL)/(pi)`

C

`(IBL)/(2pi)`

D

`(IBL)/(4pi)`

Text Solution

Verified by Experts

The correct Answer is:
C
`L = 2pi r rArr r = (L)/(2pi)`
`T = Bir = (BIL)/(2pi)`
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