Which of the following types of bearings are commonly found in electric motors?

Ball bearings are commonly found in electric motors due to their ability to reduce friction between moving parts, which enhances efficiency and performance. These bearings consist of a series of hardened steel balls that are contained within a ring or raceway. This design allows for smooth rotation and minimizes wear, making ball bearings ideal for the high-speed rotation often seen in electric motors. They can handle both radial and axial loads, contributing to the overall stability and longevity of the motor.

In electric motors, where precise alignment and smooth movement are critical for optimal performance, ball bearings are a preferred choice because they can support a significant amount of weight and provide reliable operation over time. Their design helps to distribute the load evenly, reducing the risk of overheating and failure, which is essential in maintaining the efficiency of electric motors. This combination of factors makes ball bearings a standard component in many types of electric motors used in various applications.