Find (a) the impedance of the
circuit; (b) the phase difference between the voltage across the source
and the current; (c) the power dissipated in the circuit; and (d) the
power factor Solution
(a) To find the impedance of the circuit, we first calculate XL and XC XL = 2 pnL
    = 2 × 3 14 × 50 × 25