What is considered the primary advantage of using AC current?

The primary advantage of using AC current lies in its ability to transform voltages efficiently. This is accomplished through the use of transformers, which can increase (step-up) or decrease (step-down) voltage levels. This feature is crucial for the transmission of electricity over long distances, as higher voltage levels reduce the current and, consequently, the energy lost as heat due to resistance in the wires.

This characteristic of AC makes it possible to generate electricity at a power plant at a high voltage, transmit it over extensive distances, and then reduce the voltage for safe use in homes and businesses. The capacity to easily change voltage levels is a fundamental reason why AC power is widely used in power generation and distribution systems globally.