An ac voltmeter measurement indicates the amplitude of a sinusoid and not its phase angle. The magnitude and phase can be inferred by making several measurements and using KVL. For example, Figure P8-70 shows a relay coil of unknown resistance and inductance. The following ac voltmeter readings are taken with the circuit operating in the sinusoidal steady state at \(f=60 \mathrm{~Hz}:\left|\mathbf{V}_{\mathrm{S}}ight|=24 \mathrm{~V},\left|\mathbf{V}_{1}ight|=10 \mathrm{~V}\), and \(\left|\mathbf{V}_{2}ight|=18 \mathrm{~V}\). Find \(R\) and \(L\).