Which device is used to support the rotor and allow smooth rotation?

Which device is used to support the rotor and allow smooth rotation?

• A. Aid in electrical connection to the rotor
• B. Reduce friction by lubrication
• C. Help manage heat in the motor
• D. Support the rotor and allow smooth rotation

Answer: (D)

Bearings provide the support and smooth rotation for the rotor. They cradle the rotor shaft, carry the loads it experiences (radial and axial), and allow the shaft to turn with very low friction. That combination keeps the rotor properly aligned inside the motor housing while it spins. Lubrication, while important for reducing friction inside the bearing, is not the device that supports the rotor. Heat management is about removing excess heat from the motor, and electrical connections to the rotor involve components like slip rings or a commutator, not the support function. So the best description is that the bearing is the device that supports the rotor and enables smooth rotation.

Bearings provide the support and smooth rotation for the rotor. They cradle the rotor shaft, carry the loads it experiences (radial and axial), and allow the shaft to turn with very low friction. That combination keeps the rotor properly aligned inside the motor housing while it spins. Lubrication, while important for reducing friction inside the bearing, is not the device that supports the rotor. Heat management is about removing excess heat from the motor, and electrical connections to the rotor involve components like slip rings or a commutator, not the support function. So the best description is that the bearing is the device that supports the rotor and enables smooth rotation.