Electrical Engineering ⇒ Topic : Step Response of R-L Circuit

STEP RESPONSE OF R-L CIRCUIT

Figure (a) shows an initially relaxed R-L circuit in which step response is considered

                         Figure (a) R-L circuit.

The circuit equation is given by

                       ........... (1)

Taking Laplace transform of Eq. (1), we can write

          ............ (2)

Since the circuit is initially relaxed, i.e. de-energized, hence i(0-) = 0

                      ............ (3)

Taking the inverse Laplace transform of Eq. (3), we obtain
                                   .............. (4)