The correct answer is A. rotor.
The rotor is the rotating part of an electric motor or generator. It is usually made of a conductor material, such as copper or aluminum, and is surrounded by a magnetic field. When current flows through the rotor, it creates an electric field that interacts with the magnetic field, causing the rotor to rotate.
The stator is the stationary part of an electric motor or generator. It is usually made of a non-conductive material, such as steel, and is surrounded by a magnetic field. When current flows through the stator, it creates a magnetic field that interacts with the rotor, causing the rotor to rotate.
The field is the magnetic field that surrounds the rotor and stator of an electric motor or generator. It is created by current flowing through the stator windings.
The armature is the part of an electric motor or generator that carries the current that creates the magnetic field. It is usually made of a conductor material, such as copper or aluminum.
In any rotating machine that part which houses the conductors and in which e.m.f. induced is to be utilised is called the rotor. The rotor is the rotating part of an electric motor or generator. It is usually made of a conductor material, such as copper or aluminum, and is surrounded by a magnetic field. When current flows through the rotor, it creates an electric field that interacts with the magnetic field, causing the rotor to rotate.