Electrical Machines Value of specific electric loading of Induction motor is in the range of 5000 - 45000 ampere conductor / metre. 400 - 4000 ampere conductor / metre. 40 - 400 ampere conductor / metre. 30000 - 100000 ampere conductor / metre. 5000 - 45000 ampere conductor / metre. 400 - 4000 ampere conductor / metre. 40 - 400 ampere conductor / metre. 30000 - 100000 ampere conductor / metre. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In synchronous motor, the damper winding is generally used to reduce the eddy currents. prevent hunting and provide the starting torque. provide starting torque only. reduce noise level only. reduce the eddy currents. prevent hunting and provide the starting torque. provide starting torque only. reduce noise level only. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC shunt machine generates 250 V on open circuit at 1000 RPM. Armature resistance is 0.5 Ω, field resistance 250 Ω. When running as a motor takes 4 A at 250 V. Calculate the efficiency when running as a motor taking 40 A at 250 V. Armature reaction weakens the field by 4%. 67.5% 78.5% 82.5% 72.5% 67.5% 78.5% 82.5% 72.5% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The output power of a dc motor is given by none of these. EbIa. EIa. EbIa2. none of these. EbIa. EIa. EbIa2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following windings are necessary in case of all dc machines? closed winding lap winding open type winding wave winding closed winding lap winding open type winding wave winding 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 96 V 768 V 192 V 384 V 96 V 768 V 192 V 384 V ANSWER DOWNLOAD EXAMIANS APP
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