Electro Magnetic Induction And Alternating Currents Question 595
Question: The current in a coil decreases from 1 A to 0.2 A. In 10sec. Calculate the coefficient of self inductance. If induced emf is 0.4 volt. [BCECE 2004]
Options:
A) 5 H
B) 3 H
C) 4 H
D) 2 H
Show Answer
Answer:
Correct Answer: A
Solution:
$ e=-L\frac{di}{dt}\Rightarrow 0.4=-\frac{L(0.2-1)}{10} $
$ \Rightarrow L=5\ H $
