HardwareCâu 5 / 100
Which unit converts wall AC power into the DC voltages a computer's internal components need?
a.The voltage regulator module (VRM)
b.The power supply unit (PSU)
c.The uninterruptible power supply (UPS)
d.The CMOS battery
Giải thích
The PSU takes alternating current from the wall outlet and converts it into the direct current voltages such as 3.3V, 5V, and 12V used by internal parts. Choosing a PSU with adequate wattage is important for system stability. A failing PSU can cause random shutdowns or a system that will not power on.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- What is the primary purpose of RAM in a computer system?
- Which storage technology has no moving parts and generally offers faster read and write speeds?
- What does the motherboard primarily provide in a computer?
- What is the main function of a graphics processing unit (GPU)?
- Which port standard is commonly used to connect modern peripherals and supports a reversible connector?
- What does BIOS or UEFI firmware do when a computer first powers on?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với Google IT Support Professional Certificate · Quy trình kiểm tra