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Questions  

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 e.m.f. in the secondary coil?

a
2500 V
b
25000 V
c
2510 V
d
Zero

detailed solution

Correct option is B

e=-Mdidt=-5×(-5)10-3=25000 V

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