What is the primary function of an alternating-current generator?

The primary function of an alternating-current generator is to convert mechanical energy into electrical energy. This process involves the rotation of a conductor within a magnetic field, which induces an electrical current through electromagnetic induction. As the mechanical components, such as turbines or engines, provide the necessary motion, the generator effectively transforms this kinetic energy into electrical energy that can be utilized for various applications, such as powering electrical devices and systems.

The other choices do not accurately represent the main function of an alternating-current generator. Converting direct current to alternating current pertains to inverters, generating heat energy does not reflect the purpose of a generator, and stabilizing voltage is a function associated with voltage regulators rather than the basic operation of a generator itself. Understanding this fundamental function helps clarify the role of generators in electrical systems and their significance in energy conversion.