Question

A coil has an inductance of 5 MH in IT current changes from 0.1 ampere to 4.1 ampere in 0.5 seconds? calculate the induced EMF ​

Answer 1

Induced emf will be 0.04 volt

Explanation:

We have given inductance $L=5mH=5\times 10^{-3}H$

Current is changes from 0.1 amp to 4.1 amp

So $dI=4.1-0.1=4A$

Time taken to change in current dt = 0.5 sec

We have to fond the induced emf

Induced emf is given by $e=L\frac{dI}{dt}=5\times 10^{-3}\times \frac{4}{0.5}=0.04volt$

So induced emf will be 0.04 volt

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