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A poly phase synchronous motor will be used for the load of ______ over poly phase induction motor.

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A poly phase synchronous motor will be used for the load of ______ over poly phase induction motor.

(a) 600 kW 500 rpm

(b) 600 kW 1500 rpm

(c) 600 kW 3500 rpm

(d) 600 kW 1200 rpm

The question was asked during a job interview.

Enquiry is from Physical Concepts of Synchronous Machine Operation in portion Synchronous Machines of Electrical Machines

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The correct choice is (a) 600 kW 500 rpm

For explanation: A synchronous motor is used at low speed.

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