Electrical Machines A 4-pole dc generator runs at 1500 rpm. The frequencyof current in the armature winding is 50 Hz 0 Hz 100 Hz 25 Hz 50 Hz 0 Hz 100 Hz 25 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Variation in speed by ward-Leonard control of DC motors occurs due to variation in Armature voltage. Armature current. Supply voltage. Field excitaion. Armature voltage. Armature current. Supply voltage. Field excitaion. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Direction of rotation of DC motor is reversed by Interchanging armature and field connection. Reversing armature connection or field connection. Adding resistance to field circuit. Reversing supply connection. Interchanging armature and field connection. Reversing armature connection or field connection. Adding resistance to field circuit. Reversing supply connection. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 2 pole lap winding dc machine , the resistance of one conductor is 2Ω and total number of conductors is 100. Find the total resistance 200Ω 100Ω 10Ω 50Ω 200Ω 100Ω 10Ω 50Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For successful parallel operation of two single phase transformers, the most essential condition is that their KVA ratings are equal polarities are properly connected turn- ratios are exactly equal percentage impedances are equal KVA ratings are equal polarities are properly connected turn- ratios are exactly equal percentage impedances are equal ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the field of a dc shunt motor gets opened while the motor is running, then the armature will oscillate about original speed as the mean speed motor will become slow. motor will attain dangerously high speed armature current will drop armature will oscillate about original speed as the mean speed motor will become slow. motor will attain dangerously high speed armature current will drop ANSWER DOWNLOAD EXAMIANS APP
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