Define rotor.

Define rotor.

• A. A stationary magnet fixed inside the stator
• B. The outer housing that supports windings
• C. Made of copper rods connected at each end by rings attached to a shaft that protrudes from the body of the motor
• D. A set of permanent magnets fixed inside the stator core

Answer: (C)

The rotor is the rotating part of a motor or generator. In this design, it’s made as a copper-bar cage: copper rods run lengthwise and are shorted at each end by rings, with the whole assembly attached to a shaft that sticks out of the motor. When the stator’s magnetic field interacts with these bars, currents are induced, creating a magnetic field that produces torque and makes the rotor spin. This “squirrel-cage” rotor is a common type in AC induction motors. The other descriptions refer to stationary components or to magnets placed in the stator, not the rotating part.

The rotor is the rotating part of a motor or generator. In this design, it’s made as a copper-bar cage: copper rods run lengthwise and are shorted at each end by rings, with the whole assembly attached to a shaft that sticks out of the motor. When the stator’s magnetic field interacts with these bars, currents are induced, creating a magnetic field that produces torque and makes the rotor spin. This “squirrel-cage” rotor is a common type in AC induction motors. The other descriptions refer to stationary components or to magnets placed in the stator, not the rotating part.