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RRB/SSC JE Electrical 2019 || Three Phase Induction Motors Quiz 2

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Question 1

When the rotor of a three phase induction motor is blocked, the slip is:

Question 2

What is the use of the circuit shown in the figure below?

Question 3

If the frequency of 3-phase supply to the stator of a 3-phase induction motor is increased, then synchronous speed………….

Question 4

The synchronous speed of a 3-phase induction motor having 20 poles and connected to a 50 Hz source is…………….

Question 5

The value of slip is ______ if rotor speed is 1710 rpm and synchronous speed is 1800 rpm.

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Jun 28ESE & GATE EE