(a) Let a 100-V sinusoidal ac source be connected to aseries combination of a 3-2 resistor, an 8-Q inductor, anda 4-0 сараcitor. Draw the circuit diagram and the phasor diagram.(i)

Compute the series impedance.(ii) Determine the current I delivered by the source.(iii) Is the current lagging or leading the source voltage,(iv) calculate the power factor. Calculate the power triangle of the circuit. (b) |A single phase load is operating at lagging power factor and draws 10 A from the ac supply. A device is proposed to "increase the efficiency" of the motor. During a demonstration the device is placed in parallel with the load and the current from the supply drop to 8 A. When two of these devices are placed in parallel the current drop further to 6 A. What simple device will cause this drop in current? Discuss the advantages of this device. Is the efficiency of the load increased by the device?