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Power Systems

Power Systems
If sparsity of a 5 bus transmission line is 0.4. Find the number of transmission lines?

 4
 6
 3
 5

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Power Systems
Surge impedance loading of a line is increased by which of the following compensation methods?

 series capacitor
 shunt reactor
 both 1 and 2
 shunt capacitor

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Power Systems
Apart from the skin effect the non uniformity of the current distribution is also caused by

 proximity effect
 bundled conductors
 ferranti effect
All of these

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Power Systems
Which of the following method is used for changing power factor from leading to lagging

 shunt capacitor
 any of the above
 series capacitor
 shunt reactor

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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

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

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Power Systems
The line current IR flowing into balanced delta connected load is - j5 - 3 A. If the phase sequence is RYB the phase current IYB is

  5.
 10.
 20.
 55.1.

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