A circular wire loop of radius 8.1 m lies in a plane, Ask an Expert

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A circular wire loop of radius 8.1 m lies in a plane perpendicular to a uniform magnetic ?eld of magnitude 0.4 T. In 0.1 s the wire is reshaped into a square but remains in the same plane. What is the magnitude of the average induced emf in the wire during this time .

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