Electrical Machines When the armature current of 5 Amp is flowing through the dc motor the torque produced is 47 Nm. Keeping the speed constant if the armature current is increased to 7 amp, calculate the new torque. Assume losses to be constant. 65.8 Nm. 74 Nm. 27.73 Nm . 38.5 Nm. 65.8 Nm. 74 Nm. 27.73 Nm . 38.5 Nm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC motor with armature resistance of 0.5 ohms connected directly to a 220 Volt supply. If the armature is stationary then the current flowing through the armature is 570 A. 340 A. 250 A. 440 A. 570 A. 340 A. 250 A. 440 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two single-phase alternators operating in parallel have induced EMFs on open circuit of 230∠0° and 230∠10° volts and respective reactance of j2 Ω j3 Ω calculate the terminal voltage 200 V. 300 V. 223.V. 150 V. 200 V. 300 V. 223.V. 150 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines No load test on induction motor is conducted to find which of the following losses? Stator core loss Stator copper loss Rotational loss All of these Stator core loss Stator copper loss Rotational loss All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a lap winding dc machine number of conductors are 100 and number of parallel paths are 10. Find the average pitch 1 10 50 100 1 10 50 100 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction in dc motor results short circuit. decrease in speed. increase in speed. open circuit. short circuit. decrease in speed. increase in speed. open circuit. ANSWER DOWNLOAD EXAMIANS APP
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