Power Systems Find the surge impedance of a line when inductance is 160 mH and capacitance is 1µF? 200 Ω 160 Ω 800 Ω 400 Ω 200 Ω 160 Ω 800 Ω 400 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems When is the ferranti effect on long overhead lines experienced? The line is heavily loaded The line is lightly loaded The line is fully loaded The power factor is unity The line is heavily loaded The line is lightly loaded The line is fully loaded The power factor is unity ANSWER DOWNLOAD EXAMIANS APP
Power Systems Two insulator discs of identical capacitance value C make up a string for a 22 kV, 50 Hz, single phase overhead line insulation system. If pin to earth capacitance is also C, then find the string efficiency? 50% 90% 75% 86%% 50% 90% 75% 86%% ANSWER DOWNLOAD EXAMIANS APP
Power Systems The characteristic impedance of a transmission on line is Directly proportional to its length. Inversely proportional to its length. Directly proportional to square root of its length. Independent of its length. Directly proportional to its length. Inversely proportional to its length. Directly proportional to square root of its length. Independent of its length. ANSWER DOWNLOAD EXAMIANS APP
Power Systems A transmission line has 200 km operating at frequency of 10 Hz Hz. Find the type of the line any of the above long transmission line medium transmission line short transmission line any of the above long transmission line medium transmission line short transmission line ANSWER DOWNLOAD EXAMIANS APP
Power Systems A 3-phase transmission line operating at Vs = 400 kV and has ABCD parameters A= D = 0.8∠0°, B = 100∠°90 Ω, C = 0.5*10^-6∠90° ℧. Find Charging current under no load? 1.144∠90° A/phase 0.344∠90° A/phase 0.144∠90° A/phase 0.512∠90° A/phase 1.144∠90° A/phase 0.344∠90° A/phase 0.144∠90° A/phase 0.512∠90° A/phase ANSWER DOWNLOAD EXAMIANS APP
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