Electrical Machines In a transformer maximum flux density is not constant, the eddy current loss varies as f f² V V² f f² V V² ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum allowable acidity level of power transformer insulating oil is generally taken as 2 mg of KOH / gm. 0.3 mg of KOH / gm. 1 mg of KOH / gm. 0.5 mg of KOH / gm. 2 mg of KOH / gm. 0.3 mg of KOH / gm. 1 mg of KOH / gm. 0.5 mg of KOH / gm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The sparking at the the brushes, in a DC machines is due to reactance voltage. high resistance of carbon brushes. armature reaction. presence of commutator. reactance voltage. high resistance of carbon brushes. armature reaction. presence of commutator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In induction motor when the length of the air gap is increased, the magnetizing current of the motor increases while the short circuit current __________________. decreased. kept constant to certain value. increased. remains unchanged. decreased. kept constant to certain value. increased. remains unchanged. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Winding conductors of an electrical power transformer are mainly insulated by rubber insulation. paper insulation. cotton insulation. wooden insulation. rubber insulation. paper insulation. cotton insulation. wooden insulation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A lap wound DC machine has 400 conductors and 8 poles. The voltage induced per conductor is 2 volts. The machine generates a voltage of 100 V. 400 V. 800 V. 200 V. 100 V. 400 V. 800 V. 200 V. ANSWER DOWNLOAD EXAMIANS APP
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