Practice Concept Of Synchronous Speed (ns) (1.3.5.4) - DC and AC Electrical Machines
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Concept of Synchronous Speed (Ns)

Practice - Concept of Synchronous Speed (Ns)

Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

Define synchronous speed.

💡 Hint: Think about the formula related to frequency and poles.

Question 2 Easy

What is slip in the context of motors?

💡 Hint: Consider how speed differences affect motor performance.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What is the formula for calculating synchronous speed?

Ns = (120f)/P
Ns = P/(120f)
Ns = 60/Pf

💡 Hint: Remember the components in the formula: frequency and poles.

Question 2

True or False: Slip is the same as the synchronous speed.

True
False

💡 Hint: Think about what slip really represents.

3 more questions available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

A new induction motor design targets a synchronous speed of 1200 RPM at a frequency of 60 Hz. How many poles should it have?

💡 Hint: Work through the rearrangement of the synchronous speed formula.

Challenge 2 Hard

Calculate the slip of an induction motor operating at 1000 RPM if the synchronous speed is 1500 RPM.

💡 Hint: Use the slip definition to find the answer.

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Reference links

Supplementary resources to enhance your learning experience.