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An e.m.f. of 100 millivolts is induced i...

An e.m.f. of `100` millivolts is induced in a coil when the current in another nearby coil becomes `10` ampere from zero in `0.1` second. The coefficient of mutual induction between the two coils will be

A

0.5 H

B

100 mH

C

1 mH

D

10 mH

Text Solution

Verified by Experts

The correct Answer is:
C
`e = M(dI)/(dt)`
`:. M=e/((dI)/(dt))`
`=(100 xx 10^(-3))/((10-0)/(0.1)) = 1/1000 = 1mH`
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MARVEL PUBLICATION-ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENTS -TEST YOUR GRASP - 16
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