A coil of 40 H inductance is connected in series with a resistance of \[8\Omega \] and this combination is connected to the terminals of a \[2V\] battery. The inductive time constant of the circuit is (in second)
A) 40
B) 20
C) 5
D) 0.2
Correct Answer:
C
Solution :
Time constant of\[L-R\]circuit \[t=\frac{L}{R}=\frac{40}{8}=5s\]