Electrical Machines To eliminate the 5th harmonic in the induced voltages their respective pitch factor angle should be 36° 30° 72° 18° 36° 30° 72° 18° ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a given torque, reducing diverter resistance of a DC series motor causes increase in speed demanding more armature current. increase in speed but armature currnet remains the same. decrease in speed but armature current remains the same. decrease in speed demanding less armature current. increase in speed demanding more armature current. increase in speed but armature currnet remains the same. decrease in speed but armature current remains the same. decrease in speed demanding less armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC Shunt Motor having shunt field resistance of 250 Ω and armature resistance of 0.5 Ω is connected to 250 V supply and load current of 21 A. What is the back emf generated ? 150 V. 210 V 230 V. 240 V. 150 V. 210 V 230 V. 240 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A part an alternator winding consist of eight coils in series, each having an emf of 20 V rms induced in it. Coils are placed in successive slots and between each slot and the next, there is an electrical phase displacement of 30°. Find the emf of eight coils in series 76.91 V. 66.91 V. 86.91 V. 56.91 V. 76.91 V. 66.91 V. 86.91 V. 56.91 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the shunt resistance component equivalent circuit obtained by no load test of an induction motor representative of ? core loss only windage and friction loss Copper loss both 1 and 2 core loss only windage and friction loss Copper loss both 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In alternator, the rotary part is core. magnetic field poles. armature. none of these. core. magnetic field poles. armature. none of these. ANSWER DOWNLOAD EXAMIANS APP
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