Stability of a synchronous machine? Mark as favorite Copy Link decreases with increase in its excitation increases with increase in its excitation remains unaffected with increase in excitation any of the above Check Answer
A rotory converter can also be run as a? Mark as favorite Copy Link d.c. shunt motor d.c. series motor d.c. compound motor synchronous motor Check Answer
The effect of increasing the load on a synchronous motor running with normal excitation is to? Mark as favorite Copy Link decrease both armature current and power factor decrease armature current but increase power factor increase armature current but decrease power factor increase both its armature current and power factor Check Answer
If the field of a synchronous motor is under-excited, the power factor will be? Mark as favorite Copy Link zero unity lagging leading Check Answer
The back e.m.f. in the stator of a synchronous motor depends on? Mark as favorite Copy Link number of poles flux density rotor speed rotor excitation Check Answer
If the synchronous motor, properly synchronised to the supply is running on no load and is having negligible loss then? Mark as favorite Copy Link the stator current will be zero the stator current will be very small the stator current will be very high the back e.m.f. will be more than the supply voltage Check Answer
The armature current of the synchronous motor? Mark as favorite Copy Link has large values for low excitation only has large values for high excitation only has large values for low and high excitation any of the above Check Answer
A synchronous motor can operate at? Mark as favorite Copy Link lagging power factor only leading power factor only unity power factor only lagging, leading and unity power factors Check Answer
Higher the applied voltage ….. will be the stator flux and will be the pull in torque? Mark as favorite Copy Link lower, lower lower, greater greater, lower greater, greater Check Answer
ln a synchronous motor at the back e.m.f. generated in the armature at no load is approximately equal to the applied voltage, then? Mark as favorite Copy Link the motor is said to be fully loaded the torque generated is maximum the excitation is said to be zero percent the excitation is said to be hundred per cent Check Answer