The question asks where the armature winding is typically mounted in an electrical machine.

Armature Winding Mounted On Rotor

In electrical machines like motors and generators, the primary components are the stator (stationary part) and the rotor (rotating part).

• The armature winding is the component that carries the main electric current or has voltage induced in it.
• The rotor is the part of the machine that rotates.
• The stator is the part that remains stationary.

The armature winding is designed to interact with the magnetic field, which involves movement. Therefore, the armature winding is mounted on the rotating part, which is the rotor.

The correct option is 4.