Electrical Machines Armature reaction in dc motor results short circuit. increase in speed. open circuit. decrease in speed. short circuit. increase in speed. open circuit. decrease in speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ, 4 pole, 50 Hz induction motor 4 % slip, calculate frequency of the rotor emf? 2 Hz. 50 Hz. 10 Hz. 3 Hz. 2 Hz. 50 Hz. 10 Hz. 3 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power factor of an induction motor operating at no load will have a value around 0.2 lead unity 0.9 lag 0.2 lag 0.2 lead unity 0.9 lag 0.2 lag ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generator, which component plays the vital role to produce the direct current? Yoke. Armature. Brush. Commutator. Yoke. Armature. Brush. Commutator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW? 200 MW and 400MW respectively generator 1 gets over load generator 2 gets over load 230.7 MW and 369.23 MW respectively 200 MW and 400MW respectively generator 1 gets over load generator 2 gets over load 230.7 MW and 369.23 MW respectively ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The fall in speed of the DC generator due to increase in load can be corrected by increasing the excitation. reducing the load voltage. increasing the input to the prime mover. cooling the armature. increasing the excitation. reducing the load voltage. increasing the input to the prime mover. cooling the armature. ANSWER DOWNLOAD EXAMIANS APP
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