Electrical Machines The field system of an alternator is usually excited 250 / 250 V DC. 110 / 220 V AC. 230 V AC. 3 - Φ, 50 Hz and 400 V. 250 / 250 V DC. 110 / 220 V AC. 230 V AC. 3 - Φ, 50 Hz and 400 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When maximum flux density is constant, the eddy current losses are proportional to f V f2 V2 f V f2 V2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In synchronous generator, inverted V curve is drawn between field current on Y-axis and armature current on X-axis field current on Y-axis and power factor on X-axis field current on X-axis and armature current on Y-axis field current on X-axis and power factor on Y-axis field current on Y-axis and armature current on X-axis field current on Y-axis and power factor on X-axis field current on X-axis and armature current on Y-axis field current on X-axis and power factor on Y-axis ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The short circuit test on a transformer is conducted to obtain copper losses. hysteresis loss. eddy current loss. core loses only. copper losses. hysteresis loss. eddy current loss. core loses only. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Scott connections are used for three phase to single phase transformation. three phase to two phase transformation. single phase to three phase transformation. any of the above. three phase to single phase transformation. three phase to two phase transformation. single phase to three phase transformation. any of the above. 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. 100 V. 230.2 V. 50 V. 399 V. 100 V. 230.2 V. 50 V. ANSWER DOWNLOAD EXAMIANS APP
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