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 -81.82 kV 18.18 kV 81.82 kV -18.18 kV -81.82 kV 18.18 kV 81.82 kV ANSWER DOWNLOAD EXAMIANS APP
Power Systems The inertia constant of 100 MVA, 50 Hz, 4 pole generator is 10 MJ/MVA. If the mechanical input to the machine is suddenly raised from 50 MW to 75 MW, the rotor acceleration will be equal to 125 electrical degrees/s² 12.5 electrical degrees/s² 22.5 electrical degrees/s² 225 electrical degrees/s² 125 electrical degrees/s² 12.5 electrical degrees/s² 22.5 electrical degrees/s² 225 electrical degrees/s² ANSWER DOWNLOAD EXAMIANS APP
Power Systems The shape of the disc of an induction disc relay is elliptical. spiral. circular. none of these. elliptical. spiral. circular. none of these. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Sum of the elements of row i equal to shunt admittances connected to bus i. If this summation is zero, indicates there is no mutual coupling None of these both 1 and 2 shunt admittance mutual coupling None of these both 1 and 2 shunt admittance ANSWER DOWNLOAD EXAMIANS APP
Power Systems If L and C are 4 mH and 0.0001 μF respectively a current chop of magnitude 50 Amp would induced a voltage 100 kV. 400 kV. 200 kV. 50 kV. 100 kV. 400 kV. 200 kV. 50 kV. ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following produces the radio interference in communication lines? electro magnetic induction electro static induction None of these both 1 and 2 electro magnetic induction electro static induction None of these both 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
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