Synchronous Motors The induced e.m.f. in a synchronous motor working on leading power factor will be less than the supply voltage more than the supply voltage None of these equal to the supply voltage less than the supply voltage more than the supply voltage None of these equal to the supply voltage ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In order to to reverse the direction of a synchronous motor, _______ Change supply frequency Reduce dc field excitation to zero None of the listed here Interchange any two stator lines Change supply frequency Reduce dc field excitation to zero None of the listed here Interchange any two stator lines ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Slip rings in a synchronous motor carry Alternating current No current All of the listed here Direct current Alternating current No current All of the listed here Direct current ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A 50 Hz synchronous motor runs at 200 rpm. The number of salient poles on the rotor are______ 30 None of the listed here 16 36 30 None of the listed here 16 36 ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors If the field circuit of an unloaded salientpole synchronous motor gets suddenly open-circuited, then it runs at a slower speed it runs at a very high speed it continues to run at the same speed the motor stops it runs at a slower speed it runs at a very high speed it continues to run at the same speed the motor stops ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When load on a synchronous motor is increased, its armature current is increased provided, it is ______ Over-excited All of these Normally excited Under-excited Over-excited All of these Normally excited Under-excited ANSWER DOWNLOAD EXAMIANS APP
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