Electrical Machines Mechanical energy is supplied to DC generator at the rate of 4200 J / s. The generator delivers 32.2 Amp at 120 V. What is the percentage efficiency of the generator? 210 V. 212 V. 205 V. 201.02 V. 210 V. 212 V. 205 V. 201.02 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slip rings of an induction motors are made of aluminium. phosphor bronze. stainless steel. carbon. aluminium. phosphor bronze. stainless steel. carbon. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A flat compound generator is obtained from compound generator by connecting a variable resistor in parallel with the shunt field in series with the series field in parallel with the series field in series with the shunt field in parallel with the shunt field in series with the series field in parallel with the series field in series with the shunt field ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC Shunt Motor the speed can be increased by Increasing the armature current. Increasing the field current. Increasing the field current. Decreasing the field current. Increasing the armature current. Increasing the field current. Increasing the field current. Decreasing the field current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutator in DC generator is used for reduce losses increase efficiency collecting of current convert AC armature current in to DC reduce losses increase efficiency collecting of current convert AC armature current in to DC ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines φA 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 speed when running as a motor taking 40 A at 250 V. Armature reaction weakens the field by 4%. 940 RPM 960 RPM 970 RPM 920 RPM 940 RPM 960 RPM 970 RPM 920 RPM ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS