What is a generator primarily used for?

A generator is primarily used to convert mechanical energy into electrical energy. This process is fundamental to the operation of various types of generators, which typically involve mechanical motion—such as rotation of a turbine or a crank—that is transformed into electrical energy through electromagnetic induction.

In this process, the mechanical energy provided by an external source, like a wind turbine or a gasoline engine, causes movement within the generator's components, often involving a rotor and a stator. As the rotor spins, it creates a change in the magnetic field around the coils of wire in the stator, which induces an electric current. This principle is governed by Faraday's law of electromagnetic induction, stating that a change in magnetic flux can generate electricity.

While storing electrical energy is a key function of batteries and capacitors, it is not a role of generators. Similarly, the conversion of electrical energy into mechanical energy is characteristic of devices such as electric motors. Increasing voltage in a circuit is primarily the function of transformers, not generators. Therefore, the correct function of a generator aligns specifically with its role in converting mechanical energy into electrical energy, making this choice accurate.