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Power Systems

Power Systems
Surge impedance loading (SIL) is represented by

 Vph²/Zs
 both 1 and 2
 Vl²*√(C/L)
 Vl²/Zs

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Power Systems
A transmission line has impedance of (0.005 + j0.05) pu. Find the line at which maximum value of negative DC off set current is produced, if it is applied with Vm cosωt?

 9.68
 4.68 msec
 1.47 msec
 2.63 msec

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Power Systems
Under excited Synchronous phase modifier works as

 shunt reactor
 any of the above
 shunt capacitor
 series capacitor

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Power Systems
A transmission line has 50 km operating at frequency of 500 Hz. Find the type of the line?

 any of the above
 short transmission line
 long transmission line
 medium transmission line

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Power Systems
Length of the cable is doubled, its capacitance C will be

 one-half.
 unchanged.
 doubled.
 one-fourth.

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Power Systems
As the frequency of the system is increased, the charging MVAR

 remains unaffected
 decreases
None of these
 increases

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