Electrical Machines Unbalanced supply voltage given to a 3 - φ, delta connected induction motor will cause all of these. negative sequence current. less heating of the rotor. less heating of the rotor. all of these. negative sequence current. less heating of the rotor. less heating of the rotor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In applied voltage is reduced in a dc shunt motor Full load torque. None of these. Full load speed. Full load current. Full load torque. None of these. Full load speed. Full load current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 8-pole, DC generator has a simplex wave-wound armature containing 32 coils of 6 turns each. Its flux per pole is 0.06 Wb. The machine is running at 250 rpm. The induced armature voltage is 192 V 96 V 768 V 384 V 192 V 96 V 768 V 384 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Semi closed slots or totally closed slots are used in induction motors, essentially to reduce magnetising current and improve power factor improve starting torque increase pull out torque decrease starting torque reduce magnetising current and improve power factor improve starting torque increase pull out torque decrease starting torque 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 = 1. E1 / E2 = N1kw1 / N2kw2. E1 / E2 = N1 / N2. E1 / E2 = f1kw1 / f2kw2. E1 / E2 = 1. E1 / E2 = N1kw1 / N2kw2. E1 / E2 = N1 / N2. E1 / E2 = f1kw1 / f2kw2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If Kh is hysteresis constant, f is supply frequency, Bm maximum flux density in core of transformer, the expression of hysteresis loss in transformer, is given by KhfBm3. KhfBm1.6. KhfBm. Khf2Bm1.6. KhfBm3. KhfBm1.6. KhfBm. Khf2Bm1.6. ANSWER DOWNLOAD EXAMIANS APP
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