CompTIA A+ Core 1 (220-1001) — Question 64

Which of the following requires less current to provide the same amount of power to devices inside a PC?

Answer options

• A. 5.5V
• B. 12V
• C. 120V
• D. 220V

Correct answer: D

Explanation

The correct answer is D because higher voltage allows for the same power delivery with lower current, according to the formula Power = Voltage x Current. Options A, B, and C, which operate at lower voltages, would require higher current to achieve the same power output, making them less efficient in this context.