Electro Magnetic Induction And Alternating Currents Question 568

Question: The current in a coil changes from 4 ampere to zero in 0.1 s. If the average e.m.f. induced is 100 volt, what is the self inductance of the coil [MNR 1998]

Options:

A) $ 2.5\ H $

B) $ 25,H $

C) $ 400\ H $

D) $ 40\ H $

Show Answer

Answer:

Correct Answer: A

Solution:

$ e=L\frac{di}{dt}\Rightarrow 100=L\times \frac{4}{0.1}\Rightarrow L=2.5\ H $



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