Power Systems A transmission line has a surge impedance of 400 Ω is connected with the cable having surge impedance of 40 Ω, a surge magnitude of 100 kV is travelling from the transmission line towards the cable. Find the reflected voltage? 18.18 kV -18.18 kV -81.82 kV 81.82 kV 18.18 kV -18.18 kV -81.82 kV 81.82 kV ANSWER DOWNLOAD EXAMIANS APP
Power Systems Hydro-graph is similar to energy load curve. mass curve. both B and C. load curve. energy load curve. mass curve. both B and C. load curve. 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% 86%% 75% 50% 90% 86%% 75% ANSWER DOWNLOAD EXAMIANS APP
Power Systems A transmission line has 50 km operating at frequency of 500 Hz. Find the type of the line? short transmission line long transmission line any of the above medium transmission line short transmission line long transmission line any of the above medium transmission line ANSWER DOWNLOAD EXAMIANS APP
Power Systems Recovery voltage in CB is equal to normal frequency 50 Hz rms voltage. none of these. arcing period voltage. transient voltage. normal frequency 50 Hz rms voltage. none of these. arcing period voltage. transient voltage. 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 0.512∠90° A/phase 0.144∠90° A/phase 1.144∠90° A/phase 0.344∠90° A/phase 0.512∠90° A/phase 0.144∠90° A/phase ANSWER DOWNLOAD EXAMIANS APP
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