Electrical Machines The speed of stator rotating magnetic field (RMF) with respect to rotor is Nr S.Ns Ns Zero Nr S.Ns Ns Zero ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following alternators contain large number of poles? None of these Hydro alternators. Turbo alternators. Aame in both alternators. None of these Hydro alternators. Turbo alternators. Aame in both alternators. ANSWER DOWNLOAD EXAMIANS APP
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 2.781 Ω. 2.74 Ω. 25.564 Ω. 2.241 Ω. 2.781 Ω. 2.74 Ω. 25.564 Ω. 2.241 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For pure resistive load what is the armature reaction? cross magnetization demagnetization All of these magnetization cross magnetization demagnetization All of these magnetization ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which DC motor will have least percentage increase of input current, for the same percentage increase in the torque Separately Excited DC Motor DC Shunt Motor Compound Wound DC Motor DC Series Motor Separately Excited DC Motor DC Shunt Motor Compound Wound DC Motor DC Series Motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Short circuit test is performed on a transformer with a certain impressed voltage at rated frequency. If the short circuit test is now performed with the same magnitude of impressed voltage, but at frequency higher than the rated frequency then The magnitude of circuit as well as the power factor will decrease. The magnitude will both increase. The magnitude of current will decrease but the power factor will increase. The magnetude of current will increase, but power factor will decrease. The magnitude of circuit as well as the power factor will decrease. The magnitude will both increase. The magnitude of current will decrease but the power factor will increase. The magnetude of current will increase, but power factor will decrease. ANSWER DOWNLOAD EXAMIANS APP
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