Power supply
A power supply is an electrical device that offers electric power to an electrical load such as laptop computer, server, or other electronic devices. The main function of a power supply is to convert electric current from a source to the correct voltage, current, and frequency to power the load.Power supplies generally refer to generators, power plants, batteries, and solar cells (photovoltaic cells). This section describes the basic knowledge of power supply units (power supply circuits) that convert power into suitable power used for electrical appliances
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