Power Supply Unit (PSU)
The Power Supply Unit (PSU) is an essential component of a computer system that converts alternating current (AC) power from the electrical outlet into direct current (DC) power required for the internal hardware components. It distributes power to the various parts of the system, such as the motherboard, CPU, and disk drives. A PSU must provide stable and consistent power to ensure the system's reliable and efficient operation. Factors that influence the choice of a PSU include its wattage, efficiency rating, and the presence of various safety features such as overvoltage protection and short circuit protection.
Study Guide: Power Supply Unit (PSU)
The Power Supply Unit (PSU)
The Power Supply Unit (PSU) is an essential component of any computer system. It converts mains AC to low-voltage regulated DC power for the internal components of a computer.
Importance: The PSU is critical because it supplies power to all other components in a system. Without an efficient and functioning PSU, none of your machine's components could operate.
How it works: The PSU converts the high voltage AC power from the wall outlet into the lower voltage DC power that computer components need. This process involves transforming the incoming electricity and then regulating the voltage to ensure consistent power.
Exam Tips: Answering Questions on Power Supply Unit (PSU)
1. Understand its function: The PSU distributes the required voltage to every component in the PC.
2. Know the different types of PSU: There are many types of PSUs such as modular, non-modular, semi-modular. Each has its pros and cons.
3. Differentiate between AC and DC: The PSU converts AC (Alternating Current) from the wall outlet to DC (Direct Current) for use by computer components.
4. Find out how PSUs are rated: PSUs are rated by wattage, and you should know how to calculate the power a system requires.
5. Know the common PSU faults: Knowing common PSU faults and their symptoms can help answer troubleshooting questions.
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