Physics

Problem

For a particular series

RLC

circuit the rms current is

5.0\,\text{A}

. The individual voltage drops across the elements are measured to be

V_R = 60\,\text{V}

V_L = 90\,\text{V}

and

V_C = 30\,\text{V}

. (i) Determine the magnitude of the supply rms voltage

V

using an appropriate method. (ii) Calculate the impedance

Z

of the circuit. (iii) Find the phase angle

\phi

between the supply voltage and the current, stating clearly whether the current leads or lags the voltage.