FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -A power supply unit (PSU) converts mains AC to low-voltage regulated DC power for the internal components of a computer. Modern personal computers universally use switched-mode power supplies.

Detailed explanation-2: -A power supply takes the AC from the wall outlet, converts it to unregulated DC, and reduces the voltage using an input power transformer, typically stepping it down to the voltage required by the load. For safety reasons, the transformer also separates the output power supply from the mains input.

Detailed explanation-3: -There are four different types of computer power supplies: Modular, Non-Modular, Semi-Modular and Fully Modular. Modular: With the exception of connections for main power and disk drives, modular PSUs have detachable power cables.

Detailed explanation-4: -Abbreviated as PS or P/S, a power supply or PSU (power supply unit) is a hardware component of a computer that supplies all other components with power.