The primary function of a power supply is to provide electrical power to a device or system. It converts AC (alternating current) from a wall outlet into DC (direct current) that most electronic devices require.
Power supplies regulate the voltage and current to ensure the proper operation of electronic components, protecting them from power surges, fluctuations, or instability. For example, in a computer, the power supply converts the AC from the wall socket to the necessary DC voltages to run the motherboard, hard drives, and other components.
In short, a power supply is essential for ensuring devices receive the correct power to function properly and efficiently.
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