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

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°

0.325∠ -100°

0.371∠ -100°

0.725∠ 80°

0.433∠ 80°

0.325∠ -100°

0.371∠ -100°

0.725∠ 80°

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Power Systems
The skin effect of conductor will increase when

frequency decrease

diameter decrease

resistivity decrease

All of these

frequency decrease

diameter decrease

resistivity decrease

All of these

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Power Systems
Inductance of transmission line will decrease when

both GMD and GMR decrease

both GMD and GMR increase

GMD increase and GMR decrease

GMD decrease and GMR increase

both GMD and GMR decrease

both GMD and GMR increase

GMD increase and GMR decrease

GMD decrease and GMR increase

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Power Systems
A fault occurring at the terminals of an unloaded synchronous generator operating at its rated voltage has resulted in the following values of currents and voltages. IR0 = j 2.37 pu IR1 = -j 3.05 pu IR2 = j 0.68 pu VR0 = VR1 = VR2 = 0.237 pu. Which of the following faults has occurred?

LL

LLL

LLG

LG

LL

LLL

LLG

LG

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Power Systems
In an induction relay for a particular current setting the operating time 4 sec. When the time multiplier setting is 0.8 if the time multiplier setting is rest to 1 the operating time is

1.

5.

10.

un changed.

1.

5.

10.

un changed.

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Power Systems
The positive sequence reactance will be equal to negative sequence if the equipment is

none of these.

motor.

generator.

transformer and transmission lines.

none of these.

motor.

generator.

transformer and transmission lines.

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Power Systems

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

Power Systems The skin effect of conductor will increase when

Power Systems Inductance of transmission line will decrease when

Power Systems In an induction relay for a particular current setting the operating time 4 sec. When the time multiplier setting is 0.8 if the time multiplier setting is rest to 1 the operating time is

Power Systems The positive sequence reactance will be equal to negative sequence if the equipment is

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

Power Systems
The skin effect of conductor will increase when

Power Systems
Inductance of transmission line will decrease when

Power Systems
In an induction relay for a particular current setting the operating time 4 sec. When the time multiplier setting is 0.8 if the time multiplier setting is rest to 1 the operating time is

Power Systems
The positive sequence reactance will be equal to negative sequence if the equipment is