Electro Magnetic Induction And Alternating Currents Question 191
Question: Time constant of L-R circuit will be
Options:
A) $ \frac{L}{R} $
B) $ \frac{2L}{R} $
C) $ \frac{L}{2R} $
D) None of these
Show Answer
Answer:
Correct Answer: C
Solution:
- A circuit equivalent to the given circuit can be drawn as follows:
Where $ R_{eq}=R+\frac{2R\times 2R}{4R} $
$ =R+R $ $ R_{eq}=2R $
$ \therefore $ Time constant $ =\frac{L}{2R} $
