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.
B. leads the supply voltage.
C. is in phase with the supply voltage.
D. none of these answers
Show Answer
Answer: B
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