Synchronous Motors When load on a synchronous motor is increased, its armature current is increased provided, it is ______ Normally excited All of these Under-excited Over-excited Normally excited All of these Under-excited Over-excited ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Power factor of a synchronous motor is unity when The armature current is maximum None of the listed here The armature current is zero The armature current is minimum The armature current is maximum None of the listed here The armature current is zero The armature current is minimum ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors If the synchronous motor, properly synchronised to the supply is running on no load and is having negligible loss then the stator current will be zero the back e.m.f. will be more than the supply voltage the stator current will be very small the stator current will be very high the stator current will be zero the back e.m.f. will be more than the supply voltage the stator current will be very small the stator current will be very high ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The duration of sudden short-circuit test on a synchronous motor is usually about one second one hour None of these one minute one second one hour None of these one minute ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors By which of the following methods the constant speed of a synchronous motor can be changed to new fixed value ? By interchanging any two phases By changing the load By changing the supply frequency By changing the applied voltage By interchanging any two phases By changing the load By changing the supply frequency By changing the applied voltage ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor develops maximum power when load angle is 60° 45° 90° 120° 60° 45° 90° 120° ANSWER DOWNLOAD EXAMIANS APP
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