ABSTRACT
On completion of this chapter, you should be able to:
1 defi ne the terms energy, work, heat and power, and specify their SI units of measurement.
2 explain the behaviour of power in a a purely resistive a.c. circuit b a purely inductive a.c. circuit c a purely capacitive a.c. circuit d an R-L a.c. circuit e an R-C a.c. circuit.
