Electrical Machines A 4 pole 50 Hz induction motor is running at 1470 rpm. Find the speed of stator magnetic field with respect to rotor? zero 1470 rpm 1500 rpm 30 rpm zero 1470 rpm 1500 rpm 30 rpm ANSWER DOWNLOAD EXAMIANS APP
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? 212 V. 201.02 V. 205 V. 210 V. 212 V. 201.02 V. 205 V. 210 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Open circuit in a transformer is prefered with direct current high frequency supply rated transformer voltage rated transformer current direct current high frequency supply rated transformer voltage rated transformer current ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Transformer oil is used as an insulator. both A and B. a coolant. inert medium. an insulator. both A and B. a coolant. inert medium. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Essential conditions for two DC generators are connecting for parallel operation is/are polarities should be same. rating of generators should be same. both A and B. terminal voltage should be same. polarities should be same. rating of generators should be same. both A and B. terminal voltage should be same. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two generators G1 and G2 are to be operated in parallel to deliver a total current of 60 A. Generator one has a terminal voltage of 280 V on no load and 240 V when supplying 40 A current. Similarly the second generator has a voltage of 300 V when on no load and 240 V when supplying of 50 A of current. The output voltage of each generator will be 256.4 V. 238.2 V. 240 V. 271.7 V. 256.4 V. 238.2 V. 240 V. 271.7 V. ANSWER DOWNLOAD EXAMIANS APP
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