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A metallic wire is folded to form a square loop of side 'a'. It carries a current 'i' and is kept perpendicular to a uniform magnetic field B. If the shape of the wire is changed from square to a circle without altering its length and the current, calculate the amount of work done in doing so.


A metallic wire is folded to form a square loop of side 'a'. It carries a current 'i' and is kept perpendicular to a uniform magnetic field B. If the shape of the wire is changed from square to a circle without altering its length and the current, calculate the amount of work done in doing so.


Grade:upto college level

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