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A circular coil of 100 turns has an effe...

A circular coil of 100 turns has an effective radius of 0.05 m and current of 0.1 A how much work is done to trun it through `180^(@)` in a uniform field of 1.5 `wbm^(2)` if the plane of the coil is initally perpendicular to the magnetic field

A

0.5523 j

B

0.3255 j

C

0.2355 j

D

0.5235 j

Text Solution

Verified by Experts

The correct Answer is:
C
Here W=MB `(cos theta_(1)-cos theta_(2))`
=MB `(cos 0^(@)-cos 180^(@))`
`=2xx100xx0.1xx3.14xx(0.05)^(2)xx1.5=0.2355 j`
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