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Two coaxial coils are very close to each...

Two coaxial coils are very close to each other and their mutual inductance is 5 mH. If a current (50 A) sin 500t is passed in one of the coils, then find the peak value of induced emf in the secondary coil.

Text Solution

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i = 50 sin500t
as `epsilon= (-Mdi)/(dt)`
`implies epsilon= -(5 xx 10^(-3)) 50(cos 500t) xx 500`
`epsilon= -125cos500t`
`therefore "peak value"= 125V`.
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