Electrical Machines If the excitation is reduced, the power factor is None of these unity power factor lagging power factor leading power factor None of these unity power factor lagging power factor leading power factor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following induction motor has the highest starting torque? Slip ring induction motor. Same in both induction motors. None of these Squirrel cage induction motor. Slip ring induction motor. Same in both induction motors. None of these Squirrel cage induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines During hunting of a synchronous motor damper bar develops torque. field excitation increases. negative phase sequence currents are generated. harmonic are developed in the armature circuit. damper bar develops torque. field excitation increases. negative phase sequence currents are generated. harmonic are developed in the armature circuit. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To avoid formation of grooves in the commutator the brushes of same polarity should track each other. the brushes of opposite polarity should track each other. brush position has no effect on the commutator grooving. None of these the brushes of same polarity should track each other. the brushes of opposite polarity should track each other. brush position has no effect on the commutator grooving. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A series generator is connected in series to a feeder having 0.5Ω resistance to boost the voltage. The induced voltage is given by Eg = 0.6Ia, Ra = 0.2Ω and Rs = 0.3Ω. Find the voltage boosted by the generator, when delivering 400 Amp? 40 V. 30 V. 90 V. 60 V. 40 V. 30 V. 90 V. 60 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The slight curvature at the lower end of the OCC of a self excited DC generator is due to magnetic inertia. high field resistance. residual flux. high speed. magnetic inertia. high field resistance. residual flux. high speed. ANSWER DOWNLOAD EXAMIANS APP
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