What a circuit is?

First let me tell you guys, what exactly a circuit is!
Well.. circuit is a combination of power supply, load and wires connecting them. Power supply can be either from a battery or directly from the mains. It can be either supply of current or voltage. Load maybe a device or combination of devices such as resistor, inductor, capacitor, diodes, that consumes power.

When a low level current/voltage is given to the circuit, it becomes an electronic circuit. e.g motherboard, amplifiers, cell phones. If the current/voltage given to the circuit is high, then it becomes an electrical circuit. e.g fan circuitry, motor circuitry.

Technically, power supply, load and wires are referred as active components, passive components and transmission lines respectively.