AC and DC power differ in direction, usage, and efficiency. Learn the basics of how alternating and direct current work and where each is used.

As the story goes, the rock band AC/DC took its name from a label on an old sewing machine in the Young brothers’ home. It must have meant that the machine could run on either alternating ...

Wondering if phone chargers use AC or DC power? Learn the difference, how chargers work, and why it matters for your device's safety.