Correct Answer : Option (C) : Decaying exponential function
Explanation : The RL circuit comprises of the resistor and inductor connected in series.
The equation can be written as:
1 = RI(s) + sLI(s)
1 = I(s) [R + sL]
I(s) = 1 / (R +sL)
Taking the inverse Laplace, we get:
The equation clearly depicts that the impulse response is a decaying exponential function.