Electro Magnetic Induction And Alternating Currents Question 584
Question: In a circular conducting coil, when current increases from 2 A to 18 A in 0.05 sec., the induced e.m.f. is 20 V. The self inductance of the coil is [MP PET 2001]
Options:
A) 62.5 mH
B) 6.25 mH
C) 50 mH
D) None of these
Show Answer
Answer:
Correct Answer: A
Solution:
$ |e|,=L\frac{di}{dt}\Rightarrow 20=L\times \frac{(18-2)}{0.05}\Rightarrow L=62.5\ mH $
