Electrical Machines The current drawn by a 220 V DC series motor of armature resistance 0.5Ω and back back emf 200 V is 40 A. 44 A. 440 A. 400 A. 40 A. 44 A. 440 A. 400 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Exciting current of an induction motor is higher than power transformer. none of these. lesser than power transformer. equal as power transformer. higher than power transformer. none of these. lesser than power transformer. equal as power transformer. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines With the increases in field excitation of a DC generator, its generated emf increases upto a limit and then remains almost constant. increases. decreases. remains constant. increases upto a limit and then remains almost constant. increases. decreases. remains constant. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In 3 - Φ induction motor some times copper bars are placed deep in the rotor to improve power factor. improve starting torque. reduce copper loss. improve efficiency. improve power factor. improve starting torque. reduce copper loss. improve efficiency. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 230 V, 50 Hz, 4 pole single phase induction motor is rotating in the clockwise ( forward ) direction at a speed of 1425 rpm. If the rotor resistance at standstill is 7.8 Ω. Then the effective rotor resistance in the backward branch of the equivalent circuit will be 2 Ω. 8 Ω. 10 Ω. 4 Ω. 2 Ω. 8 Ω. 10 Ω. 4 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ slip ring motor has wound rotor. any of the above. short-circuited rotor. double cage rotor. wound rotor. any of the above. short-circuited rotor. double cage rotor. ANSWER DOWNLOAD EXAMIANS APP
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