Electrical Systems, also known as circuits or networks, are designed to be combinations of three fundamental components: Resistors, capacitors, and inductors. Working together, this system is capable of distributing power to other systems.
In other words, a utility that provides electricity.
The systems are defined by their resistance, capacitance and inductance.
Every system/circuit has four basic parts:
An Energy Source can be either A/C (Alternating Current) or D/C (Direct Current). It provides voltage and current to energize a device connected to the circuit.
D/C (Direct current) energy moves in one direction, like a one-way street.
A/C energy moves both ways, like a normal two-lane road.