Question

A coil has an inductance of 5 mh and in it current changes from 0.1 a to 4.1 a in 0.5 s.calculate the induced e.m.f.?

Answer 1

Emf induced will be 0.04 volt

Explanation:

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

Current is changes from 0.1 A to 1.4 A

So change in current $dI=4.1-0.1=4A$

Time taken to change in current dt = 0.5 sec

We have to fond the emf

Emf will be equal to $e=L\frac{dI}{dt}=5\times 10^{-3}\times \frac{4}{0.5}=5\times 10^{-3}\times 8=40\times 10^{-3}=0.04volt$

Emf induced will be 0.04 volt

Learn more

In a coil when current changes from 10a to 2a in time 0.1 s, induced emf is 3.28v. What is the self inductance of coil

https://brainly.in/question/12735035