Which component is responsible for modifying AC voltage into DC voltage?

The component responsible for modifying AC voltage into DC voltage is the power supply. A power supply unit (PSU) takes the alternating current (AC) from the wall outlet and converts it into direct current (DC), which is necessary for computer components to operate. Most electronic devices, including computers, require a stable DC voltage to function correctly, as internal circuits are designed to work with DC voltage levels.

This conversion process typically involves rectification, where the AC voltage is transformed into DC voltage through diodes, followed by filtering to smooth out the output. This ensures that the voltage supplied to the components is stable and reliable for operation.

In contrast, the CPU, motherboard, and RAM serve different functions in the computer. The CPU (Central Processing Unit) processes instructions and data, the motherboard connects various components and allows them to communicate, and RAM (Random Access Memory) temporarily stores data being used by the CPU. None of these components are involved in the conversion of AC to DC power.