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Introduction: Electrical
Electric power is the rate at which electric energy is transferred by an electric
circuit. When electric current flows in a circuit, it can transfer energy to do
mechanical or thermodynamic work. Devices convert electrical energy into many useful
forms, such as heat (electric heaters), light (light bulbs), motion (electric motors),
sound (loudspeakers), information technological processes (computers), or even chemical
changes. Electric power can be produced mechanically by generation, or chemically,
or by direct conversion from light in photovoltaic cells. Electric power can be
stored chemically in batteries.
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