Alternating current (AC) generators, also known as alternators, are devices that convert mechanical energy into electrical energy in the form of alternating current. They work on the principle of electromagnetic induction, where a conductor, such as a coil of wire, rotates within a magnetic field, inducing an electric current. This current alternates direction, hence the name. AC generators are widely used in power plants and various applications, providing electricity for homes and industries. They can produce different voltages and frequencies, making them versatile for various electrical systems. The generated AC can be easily transformed and transmitted over long distances, enhancing its efficiency.