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 25.564 Ω. 2.74 Ω. 2.241 Ω. 2.781 Ω. 25.564 Ω. 2.74 Ω. 2.241 Ω. 2.781 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Transformers operating in parallel will share the load depending upon their percentage impedance. rating. leakage reactance. efficiency. percentage impedance. rating. leakage reactance. efficiency. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer, hysteresis and eddy current losses depend upon both 2 and 3 maximum flux density supply frequency load current both 2 and 3 maximum flux density supply frequency load current ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following speed control of DC motor the speed obtained is below than the rated speed? Armature circuit resistance control. Armature voltage control. Field resistance control. Any of above. Armature circuit resistance control. Armature voltage control. Field resistance control. Any of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is/are effects of armature reaction? All of these increase the maintenance and repair increase the iron loss increases the design cost All of these increase the maintenance and repair increase the iron loss increases the design cost ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a DC Shunt Motor having armature resistance of 0.5 Ω and 2 A armature current at no-load, when the armature current is changed to 20 A at loaded condition the speed is 1000 r.p.m. What is the speed at no-load? 1130 r.p.m. 1037.5 r.p.m. none of above. 4575.4 r.p.m. 1130 r.p.m. 1037.5 r.p.m. none of above. 4575.4 r.p.m. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS