ELECTRIC CIRCUIT

An electrical circuit is a special type of network, one that has a closed loop giving a return path for the current. In easy words electrical circuit is a closed loop formed by a power source, wires, a fuse, a load, and a switch. When the switch is turned on, the electrical circuit is complete and current flows from the negative terminal of the power source, through the wire to the load, to the positive terminal. An electronic circuit is composed of individual electronic components, such as resistors, transistors, capacitors, inductors and diodes, connected by conductive wires or traces through which electric current can flow.
There are three types of circuits 1. series circuits 2. parallel circuits and 3. series-parallel circuits. A series circuit has only one possible path that the electrical current may flow. If the electrical circuit is broken, none of the load devices will work. A parallel circuit has more than one path, so if one of the paths is broken, the other paths will continue to work.
A series-parallel circuit attaches some of the loads to a series circuit and others to parallel circuits. If the series circuit breaks, none of the loads will function. If one of the parallel circuits breaks, however, that parallel circuit and the series circuit will stop working, but the other parallel circuits will continue to work.