What is a circuit ? Explain it and it's role.
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An electrical circuit is a device which provides the complete path for current to flow. A circuit consists of three basic things to function: A source of voltage. A conductive path which facilitates the movement of charges. A resistor (say, a light bulb) which requires electricity to do work.
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Electric circuit, path for transmitting electric current. An electric circuit includes a device that gives energy to the charged particles constituting the current, such as a battery or a generator; devices that use current, such as lamps, electric motors, or computers; and the connecting wires or transmission lines.
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