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In the figure, magnetic energy stored in...

In the figure, magnetic energy stored in the coil is `

A

`4 pi xx 10^(-2) N,+y`

B

`4 pi xx 10^(-2) N.-y`

C

`4 sqrt(3) pi xx 10^(-2) + y`

D

`4 sqrt(3) pi xx 10^(-2) N,-y`

Text Solution

Verified by Experts

The correct Answer is:
D
Force on each part of ring is shown in figure

`= 20.12 pi (0.5 xx10^(-3))(0.2)((sqrt(3))/(2))`
`=4 sqrt(3)pi xx10^(-2)N`
Clearly the force is along -y direction.
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