Ace the 2025 CET Test – Electrify Your Certification Journey!

AC stands for Alternating Current, which is a type of electrical current where the flow of electricity periodically reverses direction. This is in contrast to Direct Current (DC), where the flow is unidirectional. Alternating Current is commonly used in residential and commercial power supply systems because it is more efficient for transmitting electricity over long distances. The ability to step up and down the voltage with transformers also makes AC advantageous for power distribution.

Additional options like Active Circuit, Analog Control, and Advanced Capacitor do not correctly define AC in the context of electrical components. Active Circuit refers to electronic circuits with components that can control the flow of electricity, whereas Analog Control involves managing variables in a continuous manner. Advanced Capacitor does not pertain to a method of current flow and instead refers to a specific component. Hence, "Alternating Current" accurately characterizes AC in electrical engineering.