Is the generator output constant or variable?

The generator output is variable according to battery condition because the performance of a generator is influenced by the state of the battery it is charging or powering. As the battery discharges, its voltage and current may change, which in turn affects the output of the generator. A fully charged battery will draw less from the generator and maintain a more stable output, whereas a battery in a lower state of charge will require more current from the generator to charge, leading to fluctuations in output.

In automotive or stationary generators, factors such as load demands and battery condition play a critical role in determining the output voltage and current. Thus, the output is not constant across different battery states, making option B the most accurate answer.