In this section, we explore the transient response of a series RLC circuit
by applying voltage step and capturing the voltage variation across the
capacitor. The coil used is 3000 turns of 44SWG wire. The inductance is
around 120 mH and the resistance is around 550 Ohms. The capacitance value
is 0.1 uF.
Photograph of the experimental setup.
The observed waveforms are shown below. It shows that the circuit is
under damped. The frequency and damping factor are calculated by fitting the
data the a sinusoid multiplied by an exponential function. The damping
can be increased by adding more resistance or by increasing the C/L ratio.
Screen shot of the transient response of under damped LCR circuit.