ABSTRACT
This chapter details two main types of electricity: direct current electricity and alternative current electricity. It explains what an electric circuit is, presents a schematic representation of an electric circuit, and describes the basic components in any electric device or circuit. The chapter shows what a resistor in an electric circuit is and what effect it has on the circuit; what an inductor is and what it does; and what a capacitor is and its role in electricity. It also explains resistance, inductance and capacitance and how they are calculated. The chapter provides two important properties of electricity, current and voltage, and explores an analogy between electricity and water flow in a pipeline. It presents some of the units used to measure electricity and electric components. A battery or an electric generator is a source of electromotive force, measured in volts.
