Electrical Machines 1 KVA, 230 V, 50 Hz, single phase transformer has an eddy current loss of 30 watts. The eddy current loss when the transformer is excited by a dc source of same voltage will be more than 30 W 30 W zero watt less than 30 W more than 30 W 30 W zero watt less than 30 W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Cogging and crawling are phenomena associated with any of the above. the former at a fraction of its rate speed and the latter during starting. the former during starting and the latter at a fraction of its rated speed. cage induction machines and they are essentially the same. any of the above. the former at a fraction of its rate speed and the latter during starting. the former during starting and the latter at a fraction of its rated speed. cage induction machines and they are essentially the same. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The leakage reactance of a 3-phase alternator is determined by performing open circuit and short circuit tests. open circuit and zero power factor tests. zero power factor and slip tests. short circuit and slip tests. open circuit and short circuit tests. open circuit and zero power factor tests. zero power factor and slip tests. short circuit and slip tests. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Find the reactance voltage when current is changed from -2A to 2A in 4 sec and self inductance is 1H? 1 V 0 V 4 V 2 V 1 V 0 V 4 V 2 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous motor will deliver maximum power when load angle is equal to internal angle θ. input power factor is unity. load angle is 0°. load angle is 45°. load angle is equal to internal angle θ. input power factor is unity. load angle is 0°. load angle is 45°. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The functions of inter poles are both 1 and 2 nullify reactance voltage and improve the commutation. reduce cross magnetization effect and improve commutation None of these both 1 and 2 nullify reactance voltage and improve the commutation. reduce cross magnetization effect and improve commutation None of these ANSWER DOWNLOAD EXAMIANS APP
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