Synchronous Motors A synchronous motor connected to infinite bus-bars has at constant full load, 100% excitation and unity power factor. On changing the excitation only, the armature current will have leading power factor with under-excitation leading power factor with over-excitation lagging power factor with over-excitation no change of power factor leading power factor with under-excitation leading power factor with over-excitation lagging power factor with over-excitation no change of power factor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The rotor of a synchronous motor is Nonsalient pole type Salient pole type Identical to that of a dc motor None of the listed here Nonsalient pole type Salient pole type Identical to that of a dc motor None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Synchronous motor always run at More than synchronous speed The synchronous speed Less than synchronous speed None of the listed here More than synchronous speed The synchronous speed Less than synchronous speed None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When a synchronous motor is pulled out of synchronism, the stator current ________ Become zero Is decreased too much Remains unchanged Is increased too much Become zero Is decreased too much Remains unchanged Is increased too much ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The minimum armature current of the synchronous motor corresponds to operation at zero power factor leading 0.707 power factor lagging unity power factor 0.707 power factor leading zero power factor leading 0.707 power factor lagging unity power factor 0.707 power factor leading ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Leading power factor synchronous motors cost ______ the unity pf motors. Less than More than None of the listed here About the same as Less than More than None of the listed here About the same as ANSWER DOWNLOAD EXAMIANS APP
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