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Two coils are close to each other. The first coil carries a current given by i(t)...

Two coils are close to each other. The first coil carries a current given by i(t) = 4.00e−0.0250t sin 120πt, where i is in amperes and t is in seconds. At t = 0.725 s, the emf measured across the second coil is −3.00 V.

What is the mutual inductance of the coils?
_____mH

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