Electrical Machines What is the frequency of a alternator, if P = number of poles and N = revolution made per second? 120 / PN Hz. PN / 2 Hz. 120N / P Hz. 120P / N Hz. 120 / PN Hz. PN / 2 Hz. 120N / P Hz. 120P / N Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following statement is correct, if short circuit ratio is high? Low short circuit current High voltage regulation Good voltage regulation None of these Low short circuit current High voltage regulation Good voltage regulation None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machine armature windings are placed on rotor because of the necessity for generation of voltage. development of torque. commutation. electromechanical energy conversion. generation of voltage. development of torque. commutation. electromechanical energy conversion. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Find the developed torque DC Series Motor having armature resistance of 0.2 Ω and taking armature current of 60 A is connected to 250 V supply. Considered brush drop of 1 V each. cant be determined. 234.76 N-m. 133.22 N-m 266.20 N-m. cant be determined. 234.76 N-m. 133.22 N-m 266.20 N-m. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In one 132 / 33 kV transformer the LV resistance is 0.02 per unit. The resistance referred to HV side is 0.01 pu. 0.08 pu. 0.02 pu. 0.16 pu. 0.01 pu. 0.08 pu. 0.02 pu. 0.16 pu. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase, alternator has generated emf per phase of 230 V with 10% 3rd harmonic and 6% 5th harmonic content. Calculate rms line voltage for star connection. 399 V. 230.2 V. 100 V. 50 V. 399 V. 230.2 V. 100 V. 50 V. ANSWER DOWNLOAD EXAMIANS APP
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