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Q.

The mutual inductance of an induction coil is  5H. In the primary coil, the current reduces from 5A  to zero in  10-3 s. What is the induced emf in the secondary coil

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a

2500 V

b

25000 V

c

2510 V

d

zero

answer is B.

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Detailed Solution

e=−Mdidt=−5×−510−3=25000 V
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