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Question: The mutual inductance of an induction coil is \(5H\). In the primary coil, the current reduces from ...

The mutual inductance of an induction coil is 5H5H. In the primary coil, the current reduces from 5A5A to zero in 10−3s10^{- 3}s. What is the induced emf in the secondary coil

A

2500V2500V

B

25000V

C

2510V

D

Zero

Answer

25000V

Explanation

Solution

e=−Mdidt=−5×(−5)10−3=25000 6muVe = - M\frac{di}{dt} = - 5 \times \frac{( - 5)}{10^{- 3}} = 25000\mspace{6mu} V