ABSTRACT
This chapter details series circuits, the equivalent resistor in series resistors, and parallel circuits. It explores the equivalent resistor in parallel resistors, combined series and parallel circuits, and the equivalent resistor for a set of resistors combined together in series and parallel. The chapter presents the use of a voltage divider for providing a desired voltage, and power calculations for all DC circuits. It provides the behavior of a capacitor when in a DC circuit and the behavior of an inductor in a DC circuit, and shows what "time constant" in an electric circuit is. There are various currents in any circuit containing parallel components. There exist some relationships between these currents. These relationships can be found from the rule of parallel circuits. In a parallel circuit all the components are directly connected to the electric source. In this way, the full voltage of the source is applied to all the components in the circuit.
