Electrical Machines Poles of DC machine are often laminated to reduce pulsation loss. reduce iron weight. dissipate more heat. reduce armature reaction. reduce pulsation loss. reduce iron weight. dissipate more heat. reduce armature reaction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When excitation is increased (over excitation), the synchronous generator operates at unity power factor. any of the above. leading power factor. lagging power factor. unity power factor. any of the above. leading power factor. lagging power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of a DC compound motor can be reversed by interchanging series field connections. armature connections. armature or field connections. shunt field connections. series field connections. armature connections. armature or field connections. shunt field connections. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines It is advisable to start a DC series motor with some load to Limit the current. Limit the flux. Avoid sparking. Limit the speed. Limit the current. Limit the flux. Avoid sparking. Limit the speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole 50 Hz induction motor is running at 1470 rpm. The frequency of rotor current is 5 Hz 0 Hz 50 Hz 1 Hz 5 Hz 0 Hz 50 Hz 1 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4-pole dc generator runs at 1500 rpm. The frequencyof current in the armature winding is 100 Hz 0 Hz 25 Hz 50 Hz 100 Hz 0 Hz 25 Hz 50 Hz ANSWER DOWNLOAD EXAMIANS APP
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