-
Voltage across the open-circuited field terminals of a synchronous machine under slip test is
-
- d.c.
- d.c. of slip frequency
- a modulated supply frequency ac voltage with slip frequency envelope
- a.c. of supply frequency
Correct Option: B
When then driving power from the prime mover driving the alternator is lost, but alternator remains connected to the supply network and the field supply also remains, the alternator will behave as a synchronous motor and will also continue to rotate the same direction.
