Electro Magnetic Induction And Alternating Currents Question 578
Question: An average induced e.m.f. of 1V appears in a coil when the current in it is changed from 10A in one direction to 10 A in opposite direction in 0.5 sec. Self-inductance of the coil is [CPMT 2001]
Options:
A) 25 mH
B) 50 mH
C) 75 mH
D) 100 mH
Show Answer
Answer:
Correct Answer: A
Solution:
$ |e|,=L\frac{di}{dt}\Rightarrow 1=\frac{L\times { 10-( -10 ) }}{0.5}\Rightarrow L=25mH $
