SSC JE Electrical 2019 with solution SET-2
Which of the following is an important feature of a 3-phase synchronous motor?

No starting torque
Low starting current
Low starting torque
High starting torque

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SSC JE Electrical 2019 with solution SET-2
A series magnetic circuit will have

Same magnetic flux
Total reluctance of a series circuit = difference of the reluctances in different parts of the circuit
Different magnetic flux
Two or more paths for magnetic flux

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SSC JE Electrical 2019 with solution SET-2
During the ______ period the power supply to the motor is cut-off and the train is allowed to run due to its own momentum?

Notching up
Coasting
Free running
Braking

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SSC JE Electrical 2019 with solution SET-2
If the AC voltage and current are given by the following expressions?
v = 200sin (314t — 60°)
i = 50sin (720t), then what is the phase relation between them?

Voltage and current are in phase
Voltage lags current by 60°
Can’t be determined
Voltage leads current by 60°

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