Electrical Machines For 250 volt DC Shunt Motor the armature and field resistance are 0.5 ohm and 250 ohm respectively. What will be the back e.m.f. produced when it takes a load current of 21A. 220 V. 150 V. 280 V. 240 V. 220 V. 150 V. 280 V. 240 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC Motor is driving a constant load torque having armature resistance of 0.25 Ω and armature current of 60 A having connected to a voltage of 230 V. Now a resistance of 1 ohm is added into the armature circuit. The ratio of their speed will be 0.62. 0.25. 1.24. 0.72. 0.62. 0.25. 1.24. 0.72. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For P pole machine relation between electrical degrees and mechanical degrees is θelec = θmech θelec = 2/P*θmech θelec = 4/P*θmech θelec = P/2*θmech θelec = θmech θelec = 2/P*θmech θelec = 4/P*θmech θelec = P/2*θmech ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor is running with a divertor connected across its field winding. If the divertor resistance is reduced then the speed of the motor will decrease. increase. become execessively high. remain unaltered. decrease. increase. become execessively high. remain unaltered. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If a DC motor is connected across the AC supply it will Not run. Burn. Run at normal speed. Run at lower speed. Not run. Burn. Run at normal speed. Run at lower speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the mechanical angle α between the stator and rotor poles increases, then the stator current Remains unchanged. Increases. Decreases. None of above. Remains unchanged. Increases. Decreases. None of above. ANSWER DOWNLOAD EXAMIANS APP
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