Electrical Machines A 220 V DC machine has an armature resistance 1Ω. If the full load current is 20 A, the difference of induced voltage and generator is 60 V. 20 V. 0 V. 40 V. 60 V. 20 V. 0 V. 40 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor having 8 poles runs at 727.5 rpm. If the supply frequency is 50Hz, the emf in the rotor will have a frequency of 2.5Hz 48.5Hz 1.5Hz 51.5Hz 2.5Hz 48.5Hz 1.5Hz 51.5Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines which of the following type of brush and their application is/are correct copper graphite → low voltage high current density All of these electro graphite → large ratings carbon brush → normal ratings copper graphite → low voltage high current density All of these electro graphite → large ratings carbon brush → normal ratings ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hysteresis loop represents the area of total iron losses copper loss eddy current loss hysteresis loss total iron losses copper loss eddy current loss hysteresis loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following pairs is/are correct? open slot----- leakage flux is less semi closed slot-----leakage flux is moderate closed slot----- leakage flux is high All of these open slot----- leakage flux is less semi closed slot-----leakage flux is moderate closed slot----- leakage flux is high All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If Ke is eddy current constant, Kf is form factor, f is supply frequency, Bm maximum flux density in core of transformer, the expression of eddy current loss in transformer, is given by Kef2KfBm2. Kef2Kf2Bm. KefKf2Bm2. Kef2Kf2Bm2. Kef2KfBm2. Kef2Kf2Bm. KefKf2Bm2. Kef2Kf2Bm2. ANSWER DOWNLOAD EXAMIANS APP
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