Which of the following is a typical source of AC electrical power?

AC generators, also known as alternators, are devices specifically designed to convert mechanical energy into alternating current (AC) electrical energy. They operate on the principle of electromagnetic induction, where a coil of wire is rotated within a magnetic field, inducing an alternating current in the wire. This makes AC generators a primary and typical source of AC electrical power, commonly found in power plants and various industries.

In contrast, batteries provide direct current (DC) power, not alternating current. Transformers are used to change the voltage of AC power but do not generate power on their own. Capacitors can store and release electrical energy, but they primarily work with AC in terms of managing power in circuits rather than being a source of power in the same context as generators. Therefore, AC generators stand out as the typical source of AC electrical power in this context.