AC Motors: The Basics

What voltage level is a low voltage 3-phase induction motor designed to run on?

• 500-600V

• 380-480V

• 100-220V

• 220-300V

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What does it mean if a motor is described as asynchronous?

• The motor does not have a rotor

• The rotor rotates at a slightly slower speed than the magnetic field

• The rotor rotates faster than the magnetic field

• The rotor rotates at the same speed as the magnetic field

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Where are 3-phase motors commonly used?

• In electric vehicles

• In residential home appliances

• In digital devices

• In industrial and commercial applications

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Why are 3-phase motors widely used in industry?

• Because they have high starting torque and high efficiency

• Because they are expensive

• Because they have low starting torque

• Because they are difficult to control

What makes 3-phase motors a popular choice for a wide range of applications?

• Their complexity and high maintenance cost

• Their limited availability and specialized use

• Their high starting torque, high efficiency, and low cost

• Their exclusive use in high-tech industries

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