Figure P1-14 shows a simple single-phase ac power system with three loads. The voltage source is
impedances of these three loads are
Answer the following questions about this power system.
(a) Assume that the switch shown in the figure is initially open, and calculate the current I, the power factor, and the real, reactive, and apparent power being supplied by the source.
(b) How much real, reactive, and apparent power is being consumed by each load with the switch open?
(c) Assume that the switch shown in the figure is now closed, and calculate the current I, the power factor, and the real, reactive, and apparent power being supplied by the source.
(d) How much real, reactive, and apparent power is being consumed by each load with the switch closed?
(e) What happened to the current flowing from the source when the switch closed? Why?
