Power Systems
Which of the following statements is/are true? The elements of each row of a Y bus matrix for load flow studies in power system add up to zero

 if the shunt admittances at the buses are ignored
 if the mutual couplings between transmission lines are absent
 if both 2 and 3 are satisfied
 always

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Power Systems
Which statement is not correct for the transmission line parameter R, L, G and C

 At high frequencies at which most of communication system operate the internal inductance of the conductor is neglected.
 For each line, the conductors are characterized by σ c, μ c, εo = ε c and the homog
 The line parameter R,L,G and C are uniformly distributed along the entire length of the line C.
 G = I/R. R is the AC resistance per unit length of conductor C.

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