In terms of construction, AC induction motors are described as?

• A. Having brushes and armature
• B. Having no brushes or armature
• C. Having only brushes
• D. Having a commutator

Answer: (B)

AC induction motors generate torque without any direct electrical connection to the rotor. The stator creates a rotating magnetic field, and currents are induced in a closed rotor path (usually a squirrel-cage design). Because the rotor isn’t connected to the power supply, there are no brushes, armature windings, or a commutator. That’s why the description is having no brushes or armature. Other motor types rely on brushes and a commutator or have an armature wound to the supply, which induction motors do not use.