Electrical Machines A 500 V, 55 kVA single phase alternator has an effective resistance of 0.5 Ω. An excitation current of 10 A produces 200 A armature current on short circuit and an emf of 450 V on per circuit. The synchronous reactance will be 2.74 Ω. 2.241 Ω. 25.564 Ω. 2.781 Ω. 2.74 Ω. 2.241 Ω. 25.564 Ω. 2.781 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The DC generator runs at a speed of 1000 rpm and flux per pole is 0.2 Wb, number of poles are 2 the winding is wave wound and having 480 conductors. The critical speed is 1200 rpm. Then the generated emf ( Eg ) 1500 Volt. 0 Volt. 2000 Volt. 1600 Volt. 1500 Volt. 0 Volt. 2000 Volt. 1600 Volt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 3 - Φ induction motor none of them. power factor at starting in the same as that while running. power factor at starting is low as compared to that while running. power factor at starting is high as compared to that while running. none of them. power factor at starting in the same as that while running. power factor at starting is low as compared to that while running. power factor at starting is high as compared to that while running. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following rotor requires damper winding? Cylindrical rotor. None of these Salient pole rotor. Both type rotor. Cylindrical rotor. None of these Salient pole rotor. Both type rotor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The principle of dynamically induced emf is utilized in thermocouple. transformer. generator. choke. thermocouple. transformer. generator. choke. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following alternators contain large number of poles? Turbo alternators. None of these Hydro alternators. Aame in both alternators. Turbo alternators. None of these Hydro alternators. Aame in both alternators. ANSWER DOWNLOAD EXAMIANS APP
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