According to Faraday's law of electromagnetic input, the Ac generator is operational.

As the coil rotates, it undergoes change in the magnetic flux. According to Faraday's law of electromagnetic induction, electrons are transmitted by an EMF embedded in a coil that generates electricity generation. The circuit is closed with a load (lamp), where the current is interacted with the environment as the flow changes naturally.

The rotating coil is known as the rotor, and the field pillars as the stator.

But in reality, Ac generators or alternators are designed in such a way that the rotating part (Rotor) is a magnetic field. Conversely, the coil is stationary (stator) of the machine.