Multiple choice

How is power supplied to a low-power USB device?

  1. Through a power cable

  2. From an external power supply

  3. Directly from the computer's power supply

  4. Through the USB cable

  5. None of these

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

USB devices receive power through the USB cable itself from the computer's power supply. Low-power devices don't need separate power cables or external adapters.