AC stands for which of the following?

• A. Arc Current
• B. Automatic Current
• C. Alternating Current
• D. Alternating Charge

Answer: (C)

AC stands for Alternating Current. The key idea is that the current’s direction periodically reverses, typically many times per second, so electrons wiggle back and forth rather than flow in one steady direction. This contrasts with direct current, where flow is constant in one direction, like from a battery. The term is used because, in household power, the voltage and current alternate in polarity, which is why devices can be powered and transformed efficiently through wiring and transformers. The other options don’t fit: an arc current describes a discharge, automatic current isn’t a standard term, and alternating charge isn’t the way we describe how electrical power moves.