A four-pole 60-hertz induction motor has a...

Question 1 / 270705eccefa4bacbc34ba4d481e8

Question 1 of 270705eccefa4bacbc34ba4d481e8

A four-pole 60-hertz induction motor has a synchronous speed of 1800 RPM and a slip of 4 percent at full load. What will be its full load speed?

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Question 1 of 27070

A four-pole 60-hertz induction motor has a synchronous speed of 1800 RPM and a slip of 4 percent at full load. What will be its full load speed?

🔍 Key Concepts

• Synchronous speed vs. actual rotor speed in an induction motor • Definition of slip as a percentage of synchronous speed • How to convert a slip percentage into an RPM difference

💭 Think About

• First, think about what 4% slip physically means in terms of how much slower the rotor turns than synchronous speed. • Set up a simple percentage calculation using the given synchronous speed (1800 RPM) and the slip (4%). What is 4% of 1800? • Once you know how many RPM represent 4% slip, consider whether you should add or subtract that value from the synchronous speed to get the full-load speed.

✅ Before You Answer

• Be sure you are using 1800 RPM as the base speed when applying the 4% slip. • Confirm whether slip means the rotor runs slower or faster than synchronous speed in an induction motor. • Double-check your final RPM against the choices to ensure it is less than synchronous speed but not by an unrealistically large amount.

Question 1 of 27070

A four-pole 60-hertz induction motor has a synchronous speed of 1800 RPM and a slip of 4 percent at full load. What will be its full load speed?

1728.0 RPM

1730.7 RPM

1800.0 RPM

1872.0 RPM