Question 6 Set up and solve the system of equations for the currents in the branches of the given network. 27V Prepared by Engr. Abrar Khalid Question 7 Solve the following system by LU-decomposition x- 3y = -5, y+32=-1, 2x-10y + 22 = -20 Question 8 Find an LU decomposition of A = 51 Question 9 Find the least squares regression line for the points (1, 1), (2, 2), (3, 4), (4, 4) and (5,6). Question 10 The flow of traffic at Kalma Chowk, Ferozpur road, Lahore is shown below: a) Solve the system. b) Find the traffic flow when x, = 300 |200 100 100 I200

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HVDC

HVDC stands for high voltage direct current in the electric power transmission system. The high voltage direct current system uses direct current (DC) for the transmission of electrical power through transmission lines in contrast with the alternating current that is the AC system. The HVDC is used to transmit bulk power point-to-point through long distances transmission lines. Power is rapidly transferred because the efficiency of transmission lines is greatly increased over long distances due to HVDC lines.