Where do most USB devices get their power?
A) Self-powered by AC
B) Self-powered by DC
C) USB devices don't need power
D) USB bus

Question

Quizplus · Accepted Answer

Most USB devices get their power from the USB bus. This means that they draw power from the USB port on the computer or from a USB hub. This is why many USB devices can be plugged directly into a computer or hub without the need for an external power source. Some USB devices, such as external hard drives or cameras, may have their own power source and can be configured to either draw power from the USB bus or from their own source.

Where Do Most USB Devices Get Their Power