When the armature is held stationary in a generator, it is called the?

In a generator, when the armature is held stationary, it is referred to as the stator. The stator is the part of the generator that remains fixed in place and can house the windings through which the magnetic field operates. When the armature is stationary, it typically means that the magnetic field is being rotated instead. This configuration is commonly used in various types of generators, such as alternators, where the rotating magnetic field induces an electrical current in the stationary winding.

The other terms listed are associated with different components of electrical machines. The rotor refers to the rotating part of the machine, typically the armature in many generators, which generates electricity by moving within the magnetic field. The field usually refers to the magnetic field created by the magnets or coils in the machine, responsible for inducing current. An exciter is typically a device that supplies the field windings with energy, often used to produce the initial magnetic field necessary for generating electricity. Therefore, identifying the armature's stationary state as the stator aligns with its function and role correctly within the context of generator operation.