Electro Magnetic Induction And Alternating Currents Question 520

Question: An e.m.f. of 5 volt is produced by a self inductance, when the current changes at a steady rate from 3 A to 2 A in 1 millisecond. The value of self inductance is [CPMT 1982; MP PMT 1991; CBSE PMT 1993; AFMC 2002]

Options:

A) Zero

B) 5 H

C) 5000 H

D) 5 mH

Show Answer

Answer:

Correct Answer: D

Solution:

$ L=\frac{e}{di/dt}=\frac{5}{(3-2)/{{10}^{-3}}}=\frac{5}{1}\times {{10}^{-3}}=5milli\ henry $



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