Electrical Machines An induction motor having 8 poles runs at 727.5 rpm. If the supply frequency is 50Hz, the emf in the rotor will have a frequency of 2.5Hz 1.5Hz 51.5Hz 48.5Hz 2.5Hz 1.5Hz 51.5Hz 48.5Hz ANSWER DOWNLOAD EXAMIANS APP
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 Remains same. None of these. Increase. Decrease. Remains same. None of these. Increase. Decrease. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Transformer core is laminated to reduce both 1 and 2. copper loss. eddy current loss. hysteresis loss. both 1 and 2. copper loss. eddy current loss. hysteresis loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In travelling cranes for swing action which motor is preferred? Capacitor type induction motors. AC slip ring IM. DC series motor. Reluctance motor. Capacitor type induction motors. AC slip ring IM. DC series motor. Reluctance motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The current drawn by a DC motor at the time of starting is Very low. Normal. Very high. Zero. Very low. Normal. Very high. Zero. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine, which of these parameters remain the same whether it runs as a DC motor or a DC generator? Armature current. Can not be determined. Mechanical power. Induced emf. Armature current. Can not be determined. Mechanical power. Induced emf. ANSWER DOWNLOAD EXAMIANS APP
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