Which term refers to the rotating part of an electrical machine that carries current and interacts with the magnetic field to produce torque?

Which term refers to the rotating part of an electrical machine that carries current and interacts with the magnetic field to produce torque?

• A. Amplifier
• B. Autotransformer
• C. Bridge circuit
• D. Armature

Answer: (D)

The rotating current-carrying component that sits in the magnetic field to produce torque is the armature. In a motor, the armature windings (or conductors on the rotor) carry current and interact with the magnetic flux from the stator or field windings. This interaction creates magnetic forces on the conductors; the sum of these forces generates torque, causing rotation. The other options describe devices or networks (an amplifier, a transformer winding, or a bridge circuit) that don’t represent the rotating, current-carrying part of an electrical machine, so they don’t fit as the term for what produces torque.

The rotating current-carrying component that sits in the magnetic field to produce torque is the armature. In a motor, the armature windings (or conductors on the rotor) carry current and interact with the magnetic flux from the stator or field windings. This interaction creates magnetic forces on the conductors; the sum of these forces generates torque, causing rotation. The other options describe devices or networks (an amplifier, a transformer winding, or a bridge circuit) that don’t represent the rotating, current-carrying part of an electrical machine, so they don’t fit as the term for what produces torque.