Electrical Machines What is the frequency of rotor current of 50 Hz induction motor operating at 4% slip? 2HZ 1 Hz 2.5Hz 50Hz 2HZ 1 Hz 2.5Hz 50Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature mmf in a dc machine is 1. stationary with respect to field poles 2. stationary with respect to armature 3. rotating with respect to field poles 4. rotating with respect to armature From these, the correct answer is 1, 4 2, 3 1, 3 2, 4 1, 4 2, 3 1, 3 2, 4 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motors are suitable for computer printer drive ? Reluctance motor. Stepper motor. Shaded pole motor. Hysteresis motor. Reluctance motor. Stepper motor. Shaded pole motor. Hysteresis motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Why are capacitors used with large AC induction motor? Improve voltage level. Improve power level. Improve power factor. Improve current level. Improve voltage level. Improve power level. Improve power factor. Improve current level. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single-winding single-phase motor has zero starting torque. low starting torque. starting torque equal to full-load torque. high starting torque. zero starting torque. low starting torque. starting torque equal to full-load torque. high starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a DC Shunt Motor having armature resistance of 0.5 Ω and 2A armature current at no-load, when the armature current is changed to 20A at loaded condition the speed is 1000 r.p.m. What is the speed at no-load? 4575.4 r.p.m. 1130 r.p.m. 963.8 r.p.m. 1037.5 r.p.m. 4575.4 r.p.m. 1130 r.p.m. 963.8 r.p.m. 1037.5 r.p.m. ANSWER DOWNLOAD EXAMIANS APP
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