Electro Magnetic Induction And Alternating Currents Question 561
Question: A varying current in a coil changes from 10 amp to zero in 0.5 sec. If average EMF is induced in the coil is 220 volts, the self-inductance of coil is [EAMCET 1994; MH CET (Med.) 1999]
Options:
A) 5 H
B) 10 H
C) 11 H
D) 12 H
Show Answer
Answer:
Correct Answer: C
Solution:
$ |e|,=L\frac{di}{dt}\Rightarrow 220=L\times \frac{10}{0.5} $
$ \Rightarrow L=11\ H $
