Question

define circuit and circuit diagram​

Answer 1

Answer:

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Answer 2

An electrical circuit is a path in which electrons from a voltage or current source flow.

The point where those electrons enter an electrical circuit is called the "source" of electrons. The point where the electrons leave an electrical circuit is called the "return" or "earth ground". The exit point is called the "return" because electrons always end up at the source when they complete the path of an electrical circuit.