Electrical Machines The no load current in a transformer lags the applied voltage by 0°. about 115°. 90°. about 75°. 0°. about 115°. 90°. about 75°. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is/are the advantages of carbon brush over the copper brush? They are not hard as copper brush They are self lubricating in nature In case of any sparking they will be less damaged than copper brushes All of these They are not hard as copper brush They are self lubricating in nature In case of any sparking they will be less damaged than copper brushes All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under which of the following conditions is a dc motor provided with compensating winding used ? 1. Wide range of speed control above normal 2. Wide range of steady load variation with no speed control 3.Wide range of rapid variation in load Select the correct answer using the codes given below : Codes : 1 and 3 2 and 3 1, 2 and 3 1 and 2 1 and 3 2 and 3 1, 2 and 3 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a DC Shunt Motor having armature resistance of 0.5 Ω and 2A armature current at no-load, when the armature current is changed to 20A at loaded condition the speed is 1000 r.p.m. What is the speed at no-load? 963.8 r.p.m. 1037.5 r.p.m. 1130 r.p.m. 4575.4 r.p.m. 963.8 r.p.m. 1037.5 r.p.m. 1130 r.p.m. 4575.4 r.p.m. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What type of dielectric material is used in capacitors used for fans and for power factor correction? Oil impregnated paper. Mica. Glass. Vacuum. Oil impregnated paper. Mica. Glass. Vacuum. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Eg (generated emf) and Eb (back emf) both are changes. none of above. different. same. changes. none of above. different. same. ANSWER DOWNLOAD EXAMIANS APP
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