An AC generator consists of the following parts: Field Magnet: It is a horseshoe-shaped permanent magnet that produces a strong magnetic field in the space between its two poles. Armature: It is a rectangular coil with a huge number of insulated copper wire that turns on a cylindrical core of soft iron. Slip Rings: The two ends of the armature are connected with the help of slip rings. Brushes: Two brushes, made up of graphite or a flexible metal rod, are pressed against the two slip rings. These brushes are responsible for feeding the current produced in the armature coil to the external circuit via wires. Energy Source: The armature coil is rotated about its axis with the help of a turbine. The rotational kinetic energy of the turbine is the factor that helps an AC generator produce electricity.