Power Systems
A power system network has n nodes, Z33 of its bus impedance matrix is j0.5 pu. The voltage at node 3 is 1.3∠ -10°. If capacitor is having reactance of -j3.5 pu is now added to the network between node 3 and reference node, the current drawn by the capacitor in pu is

 0.325∠ -100°
 0.433∠ 80°
 0.371∠ -100°
 0.725∠ 80°

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Power Systems
The value of off diagonal elements is

 sum of admittances connected at bus i
 which is connected between bus i and bus j with negative sign
 which is connected between bus i and bus j with positive sign
 sum of admittances connected at bus j

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