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The flux per pole in a synchronous motor with the field circuit ON and the stator disconnected from the supply is found to be 25 m Wb. When the stator is connected to the rated supply with the field excitation unchanged, the flux per pole in the machine is found to be 20 m Wb while the motor is running on no load. Assuming noload losses to be zero, the no-load current by the motor from the supply | |
A. | lags behind the supply voltage. [Wrong Answer] |
B. | leads the supply voltage. [Correct Answer] |
C. | is in phase with the supply voltage. [Wrong Answer] |