Electro Magnetic Induction And Alternating Currents Question 559
Question: The average e.m.f. induced in a coil in which a current changes from 0 to 2 A in 0.05 s is 8 V. The self inductance of the coil is [CPMT 1999]
Options:
A) 0.1 H
B) 0.2 H
C) 0.4 H
D) 0.8 H
Show Answer
Answer:
Correct Answer: B
Solution:
$ e=-L( \frac{di}{dt} )\Rightarrow 8=-L\times ( -\frac{2}{0.05} ) $
$ \Rightarrow \ L=0.2H $
