What electrical output is produced by an AC generator?

An AC generator is specifically designed to produce alternating current (AC). This type of electrical output varies in direction and magnitude with time, following a sinusoidal waveform. As the rotor spins within the generator, the magnetic field changes relative to the coils of wire, inducing an electromotive force (EMF) that produces an alternating voltage. This results in an alternating current, where the flow of electrons alternately moves back and forth rather than in a single direction, as seen in direct current (DC) systems.

The mechanism of induction is fundamental to how AC generators operate, allowing them to efficiently convert mechanical energy into electrical energy in the form of alternating current. This is why the choice indicating an alternating current output is the correct answer. Other types of outputs mentioned in the options do not represent the typical operational characteristics of AC generators.