When comparing energy output from an AC generator, what is true?

In an AC generator, the energy output is influenced by several factors, including the efficiency of the generator and the mechanical power supplied to it. Generally, an AC generator cannot convert all of the mechanical power it receives into electrical energy due to inherent losses. These losses can occur due to friction, heat, electrical resistance in the wiring, and other factors that affect efficiency.

Thus, the output electrical power is typically less than the mechanical power driving the generator. This means that while the generator is powered by mechanical energy, the amount of electrical energy it produces will be reduced due to these factors, leading to the conclusion that the electrical output is less than the mechanical input. Understanding this relationship helps illustrate the principle of energy conservation and the realities of power conversion in generators.