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A wire 40 cm long bent into a rectangula...

A wire 40 cm long bent into a rectangular loop `15 cmxx5 cm` is placed perpendicular to the magnetic field whose flux density is `0.8 Wbm ^(-2)`. Within 1.0 second, the loop is changed into a 10 cm square and flux density increases to 1.4 `Wbm^(-2)`. Calculate the value of induced emf.

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