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When the primary current in the spark-co...

When the primary current in the spark-coil of a car changes from 4A to zero in `10muS`, an emf of 40,000 V is induced in the secondary. The mutual inductance between the primary and the secondary windings of the spark-coil will be -

A

1H

B

0.1H

C

10 H

D

zero

Text Solution

Verified by Experts

The correct Answer is:
B
`e=(M Deltai)/(Deltat)=4000 =Mxx4/(10xx10^(-6))`
`M=0.1 H`
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