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.