Electrical Machines Consider a separately excited DC motor. If the field current is increased while the armature terminal voltage is held constant, then speed of the motor will increase. Decrease.d remains same. none of these. increase. Decrease.d remains same. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single phase transformer when supplied from 220 V, 50 Hz has eddy current loss of 50 W. If the transformer is connected voltage of 330 V, 75 Hz, the eddy current loss will be 168.75 W 75 W 50 W 112.5 W 168.75 W 75 W 50 W 112.5 W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In electric locomotive which of the following motor are used ? Separately compound motor. Synchronous motor. DC series motor. Shunt motor. Separately compound motor. Synchronous motor. DC series motor. Shunt motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines During no load test, an induction motor draws power for core loss and windage and friction loss. for core loss and copper loss. only for the small copper loss. for copper loss and windage friction loss. for core loss and windage and friction loss. for core loss and copper loss. only for the small copper loss. for copper loss and windage friction loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Dummy coils are used for increasing efficiency. mechanical balancing. All of these reducing armature reaction. increasing efficiency. mechanical balancing. All of these reducing armature reaction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of DC Shunt Motor, the speed will____ if the voltage increases, neglecting armature saturation. be unpredictable. decrease. remain the same. increase be unpredictable. decrease. remain the same. increase ANSWER DOWNLOAD EXAMIANS APP