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A square coil of edge I carrying a curre...

A square coil of edge I carrying a current `I_(2)` is placed near to a long straight wire carrying current `I_(1)` as shown in figure. Find work required to rotate the coil ABCD about the axis along edge BC by `180^(@)` to the dotted position A 'BCD' as shown.

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PHYSICS GALAXY - ASHISH ARORA-MAGNETIC EFFECTS OF CURRENT AND MAGNETISM-U.N.P
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