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

Voltage and current sine waves are in-phase when they peak and cross the zero axis at the same time. However, this rarely happens and only in AC circuits containing pure resistances. Most AC circuits ...

Imagine a 60-Hz ac power circuit. A mechanical relay, contactor, or switch will interrupt this circuit in a random manner with respect to the ac power waveform passing through it.

There are two main types of electrical current that flow through your home: Alternating and direct. The vast majority of devices around you are powered by alternating current.