Electrical Machines In a DC generator, the armature reaction results in demagnetization of leading & magnetization of trailing pole tip. magnetization of leading and demagnetization of trailing pole tip. demagnetization of centers of poles. magnetization of inter poles. demagnetization of leading & magnetization of trailing pole tip. magnetization of leading and demagnetization of trailing pole tip. demagnetization of centers of poles. magnetization of inter poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines No load test of 3-phase induction motor gives which of the following? constant loss both A and B variable loss None of these constant loss both A and B variable loss None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A belt-driven cumulatively-compound dc generator is delivering power to the dc mains. If the Belt snaps then the machine will run as a cumulative compounded motor in opposite direction differentially compounded motor in the opposite direction cumulative compounded motor in the same direction differentially compounded motor in the same direction cumulative compounded motor in opposite direction differentially compounded motor in the opposite direction cumulative compounded motor in the same direction differentially compounded motor in the same direction ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a dc generator operating on load with its brushes on the geometrical neutral axis (GNA), the magnetic neutral axis (MNA) is shifted in the direction of rotation. Now, if the brushes are given a lead of 90° (electrical), then the MNA will coincide with the GNA shift forward by less than 90° shift forward by more than 90° shift forward by 90° coincide with the GNA shift forward by less than 90° shift forward by more than 90° shift forward by 90° ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following DC generator will be in a position to build up without any residual magnetism in the field? Compound. Separately excited. Shunt. Series. Compound. Separately excited. Shunt. Series. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under which of the following conditions hunting of synchronous motor is likely to occur ? Periodic variation of load. Over-excitation. Over-loading for long period. Small and constant load. Periodic variation of load. Over-excitation. Over-loading for long period. Small and constant load. ANSWER DOWNLOAD EXAMIANS APP
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