Electrical Machines If peak value of phase mmf is F max , then peak value of the rotating field caused by three phase is 3Fmax. (1/2)Fmax. (3/2)Fmax. Fmax. 3Fmax. (1/2)Fmax. (3/2)Fmax. Fmax. 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 2.241 Ω. 25.564 Ω. 2.74 Ω. 2.781 Ω. 2.241 Ω. 25.564 Ω. 2.74 Ω. 2.781 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If a transformer has turns ratio K, the primary and secondary current are I1 and I2 respectively and magnetizing current and core loss component of no load current Iμ and Iw respectively, then I1 = KI2 + Iμ. I1 = KI2 + Iw + Iμ.ok I1 = KI2 + Iw. I1 = KI2. I1 = KI2 + Iμ. I1 = KI2 + Iw + Iμ.ok I1 = KI2 + Iw. I1 = KI2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A motor armature conductor of length 0.5 m is exposed to a flux density of 4 Wb / m2. Calculate the force experienced by the conductor, when the armature current is 5 Amp? 20 N. None of these. 15 N. Can't be determined. 20 N. None of these. 15 N. Can't be determined. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slip exists in none of above. in both machines. induction motor. synchronous motor. none of above. in both machines. induction motor. synchronous motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the field current is reduced to zero the maximum power developed by alternator is 1.644 KW. 2.73 KW. 5.46 KW. 0.9103 KW. 1.644 KW. 2.73 KW. 5.46 KW. 0.9103 KW. ANSWER DOWNLOAD EXAMIANS APP
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