Electrical Machines A 4 pole DC shunt generator having a wave winding supplies 50 lamps, each of 60 W at 120 V. The armature and field resistance are 0.2 Ω and 60 Ω respectively. The current in each armature conductor is 27 A. 13.5 A. 11.5 A. 23 A. 27 A. 13.5 A. 11.5 A. 23 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 3 - Φ IM with line frequency f1 and winding factor kw1 and kw2 for stator and rotor respectively the ratio of per phase stator winding emf E1 to per phase rotor winding emf E2 at standstill is given by E1 / E2 = N1 / N2. E1 / E2 = 1. E1 / E2 = N1kw1 / N2kw2. E1 / E2 = f1kw1 / f2kw2. E1 / E2 = N1 / N2. E1 / E2 = 1. E1 / E2 = N1kw1 / N2kw2. E1 / E2 = f1kw1 / f2kw2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For 250 volt DC Shunt Motor the armature and field resistance are 0.5 ohm and 250 ohm respectively. What will be the back e.m.f. produced when it takes a load current of 21A. 280 V. 220 V. 240 V. 150 V. 280 V. 220 V. 240 V. 150 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In shapers and slotters which motor are preferred? Synchronous motor. Slip ring IM. Double cage motor. Squirrel cage IM. Synchronous motor. Slip ring IM. Double cage motor. Squirrel cage IM. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Field weakening control method is used for the _________ ? None of these both A and B below rated speed above rated speed None of these both A and B below rated speed above rated speed ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The size of inter poles is small as compared to main poles. What is the reason? All of these In order to not to get saturated. In order to get more flux. In order to get saturated. All of these In order to not to get saturated. In order to get more flux. In order to get saturated. ANSWER DOWNLOAD EXAMIANS APP
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