Electricity needs a path to follow to get from one destination to another. And the journey is always the same: Power – Electricity always starts from a source, like a battery or an outlet.
What is a battery ?
"A battery is a device that converts chemical energy contained within its active materials directly into electric energy by means of an electrochemical oxidation-reduction (redox) reaction. This type of reaction involves the transfer of electrons from one material to another via an electric circuit."
What is circuit ?
"In electronics, a circuit is a complete circular path that electricity flows through. A simple circuit consists of a current source, conductors and a load. The term circuit can be used in a general sense to refer to any fixed path that electricity, data or a signal can travel through."
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