A circular coil of 100 turns and effective diameter `20cm` carries a current of `0.5A`. It is to be turned in a magnetic field o

A circular coil of 100 turns and effective diameter `20cm` carries a current of `0.5A`. It is to be turned in a magnetic field of `B=2.0T` from a position in which the normal to the plane of the coil makes an angle `theta` equals to zero to one in which `theta` equals to `180^(@)`. Thw work required in this process is
A. `pi` joule
B. `2pi` joule
C. `4pi` joule
D. `8pi` joule

A circular coil of 100 turns and effective diameter `20cm` carries a current of `0.5A`. It is to be turned in a magnetic field of `B=2.0T` from a posi

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