Electrical Machines Lamination of transformer core is made of cast iron. silicon steel. wrought iron. cast steel. cast iron. silicon steel. wrought iron. cast steel. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 230 volt dc motor has an armature winding resistance of 0.5 ohm. Calculate the emf induced by the motor if the full load armature current is 23 ampere. None of these. 218.5 volt. 220.4 volt. 120 volt. None of these. 218.5 volt. 220.4 volt. 120 volt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An ideal DC generated is one that has _____________ voltage regulation. negative. zero. low. positive. negative. zero. low. positive. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction in a DC machine makes an angle of 90° with the main pole axis. makes an angle with the main pole axis which is load dependent. is in direct opposition to the main poles. is in the same direction as the main poles. makes an angle of 90° with the main pole axis. makes an angle with the main pole axis which is load dependent. is in direct opposition to the main poles. is in the same direction as the main poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Breather is provided in a transformer to provide cold air in transformer. absorb moisture from air entering in transformer. filter the transformer oil. absorb moisture of air during breathing. provide cold air in transformer. absorb moisture from air entering in transformer. filter the transformer oil. absorb moisture of air during breathing. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a DC Shunt Motor having armature resistance of 0.5 Ω and 2 A armature current at no-load, when the armature current is changed to 20 A at loaded condition the speed is 1000 r.p.m. What is the speed at no-load? none of above. 1130 r.p.m. 4575.4 r.p.m. 1037.5 r.p.m. none of above. 1130 r.p.m. 4575.4 r.p.m. 1037.5 r.p.m. ANSWER DOWNLOAD EXAMIANS APP
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