Power and electricity are fundamental to the operation of PCs, and understanding their roles is crucial for both performance and safety. PCs rely on a stable and reliable power supply to function properly. Power supplies convert electrical power from outlets into usable DC power for the computer's components. It's essential to ensure that the power supply's capacity matches the requirements of the components to avoid issues or damage. Following safety procedures is paramount when dealing with electricity. Users should always use grounded outlets, surge protectors, and follow proper wiring practices. When assembling or upgrading a PC, it's important to disconnect the power source, discharge static electricity, and handle components with care to prevent damage. Power supplies often have safety features like overcurrent and overvoltage protection to safeguard components. Adhering to safety guidelines and using certified components contribute to a secure and reliable computing environment while minimizing the risk of electrical hazards.