Electrical Machines Two dc machines A and B, using the same conductor material, have armature circuit resistances of 0.4 Ω and 1.2 Ω respectively. Of the two machines, both are of the same size for the same current rating A is bigger than B for the same voltage rating B is bigger than A for the same current rating A is bigger than B for the same current rating both are of the same size for the same current rating A is bigger than B for the same voltage rating B is bigger than A for the same current rating A is bigger than B for the same current rating ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When flux density is constant in a transformer, hysteresis loss varies as f² V² f V f² V² f V 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? Mechanical power. Can not be determined. Armature current. Induced emf. Mechanical power. Can not be determined. Armature current. Induced emf. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction in dc motor results short circuit. decrease in speed. open circuit. increase in speed. short circuit. decrease in speed. open circuit. increase in speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In single phase rotary converter the number of slip rings will be three. four. two. six. three. four. two. six. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3- phase synchronous motor can operate over a wide range of power factors i.e. from lagging to leading power factor. This is achieved by changing the field excitation. varying the speed. changing the load. varying the applied voltage. changing the field excitation. varying the speed. changing the load. varying the applied voltage. ANSWER DOWNLOAD EXAMIANS APP
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