The sending-end voltage in the circuit seen in Fig. P10.48 is adjusted so that the rms value of the load voltage is always 4000 V. The variable capacitor is adjusted until the average power dissipated in the line resistance is minimum.
 a) If the frequency of the sinusoidal source is 60 Hz, what is the value of the capacitance in microfarads?
 b) If the capacitor is removed from the circuit, what percentage increase in the magnitude of Vs is necessary to maintain 4000 V at the load?
c) If the capacitor is removed from the circuit, what is the percentage increase in line loss?
