Two PC repair technicians are discussing the electrical system of a PC. Technician A says that the
power supply provides electricity to all the devices in a PC. Technician B says that the power supply
supplies 3.3, 5, and 12 volts of AC power. Which technician is correct?
volts is not power.
To determine which technician is correct, we can first review the basics of a PC's electrical system.
The power supply unit (PSU) is responsible for converting the AC (alternating current) power from your wall outlet to DC (direct current) power that is used by your PC's components. The PSU provides electricity to all the devices in a PC, including the motherboard, graphics card, storage drives, and other peripherals.
Now let's evaluate the statements made by Technician A and Technician B:
Technician A says that the power supply provides electricity to all the devices in a PC. This statement is correct, as explained above.
Technician B says that the power supply supplies 3.3, 5, and 12 volts of AC power. This statement is incorrect. The PSU does not supply AC power to the components; instead, it converts the AC power from the wall outlet to the required DC voltage levels. The commonly used voltage levels in a PC are +3.3V, +5V, and +12V, which are supplied as DC power by the PSU.
Therefore, Technician A is correct, and Technician B is incorrect. The power supply does not supply AC power; instead, it provides DC power at different voltage levels to various components in a PC.