How is the difference between the...

Question 1 / 270705eccefa4bacbc34ba4d481f1

Question 1 of 270705eccefa4bacbc34ba4d481f1

How is the difference between the synchronous speed of a three-phase induction motor and its operating speed correctly expressed?

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Question 1 of 27070

How is the difference between the synchronous speed of a three-phase induction motor and its operating speed correctly expressed?

🔍 Key Concepts

• Relationship between synchronous speed and rotor speed in a three-phase induction motor • What engineers call the difference between these two speeds in motor theory • How this quantity may be expressed: as a term vs. as a percent or decimal

💭 Think About

• Ask yourself: in motor textbooks, what is the standard technical term for the difference between synchronous speed and actual rotor speed? • Look at the options that are just ways to express a number (percent or decimal) versus the one that is a named physical quantity. • Consider: when this quantity is put into a formula, do we usually talk about a percent of full-load speed, or do we give it a specific short name?

✅ Before You Answer

• Identify which choice is a commonly used technical term in AC motor theory, not just a descriptive word. • Separate the idea of a name for the phenomenon from how big it is (percent or decimal). • Verify which term you have seen in formulas like $s = \frac{N_s - N_r}{N_s}$ , where $N_s$ is synchronous speed and $N_r$ is rotor speed.

Question 1 of 27070

How is the difference between the synchronous speed of a three-phase induction motor and its operating speed correctly expressed?

a percent of full load speed

deviation

slip

a decimal fraction of full load speed

Question 1 / 270705eccefa4bacbc34ba4d481f1

Question 1 of 270705eccefa4bacbc34ba4d481f1

How is the difference between the synchronous speed of a three-phase induction motor and its operating speed correctly expressed?

Back

Question 1 of 27070

How is the difference between the synchronous speed of a three-phase induction motor and its operating speed correctly expressed?