Electrical Machines In case of DC Shunt Motor, the speed will____ if the voltage increases, neglecting armature saturation. remain the same. be unpredictable. decrease. increase remain the same. be unpredictable. decrease. increase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a given torque, reducing divertor resistance of a DC series motor Increase in speed but armature currnet remains the same. Increase in speed demanding more armature current. Decrease in speed demanding less armature current. Decrease in speed but armature current remains the same. Increase in speed but armature currnet remains the same. Increase in speed demanding more armature current. Decrease in speed demanding less armature current. Decrease in speed but armature current remains the same. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Cross magnetization effects which of the following? both 2 and 3 reduction in main field flux reduces the terminal voltage commutation both 2 and 3 reduction in main field flux reduces the terminal voltage commutation ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A motor operates in stable region at which of the following slip? both 1 and 2 unity slip high slip region low slip region both 1 and 2 unity slip high slip region low slip region ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements regarding the magnetization characteristics of a dc generator : 1. It represents the variation of field flux with field current. 2. Variation of open-circuit terminal voltage with field current is independent of speed 3. It is non-linear from zero to rated field current 4. It helps to determine the critical field resistance at a given speed 5. It always starts from the origin Which of these statements are correct ? 1 and 4 1, 2 and 5 2, 3 and 4 3 and 5 1 and 4 1, 2 and 5 2, 3 and 4 3 and 5 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In synchronous generator V curve is drawn between either of these. field current on Y-axis and armature current on X-axis. field current on X-axis and armature current on Y-axis. field current on X-axis and power factor on Y-axis. either of these. field current on Y-axis and armature current on X-axis. field current on X-axis and armature current on Y-axis. field current on X-axis and power factor on Y-axis. ANSWER DOWNLOAD EXAMIANS APP
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