Which component of a computer supplies electrical power?

• A. Motherboard
• B. Power supply
• C. Hard drive
• D. Processor

Answer: (B)

The component that supplies electrical power to a computer is the power supply. The power supply unit (PSU) converts the electrical power from an outlet into usable power for the various components of the computer, including the motherboard, processor, storage devices, and peripherals. It regulates the voltage and provides different voltages necessary for the hardware to function properly.

The motherboard acts as the main circuit board that houses the processor, memory, and other important components, but it does not supply power itself. The hard drive is a storage device that retains data, while the processor is the central processing unit that performs calculations and executes instructions. Neither the hard drive nor the processor provides electrical power; rather, they rely on the power supply to operate. Thus, the power supply is crucial for ensuring that all parts of the computer receive the necessary electrical power to function.