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 $
