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Power Systems

Power Systems
Find the value of a729, where "a" is the operator

 α
 1
 α²
 0

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Power Systems
Due to proximity effect, the increase in conductor resistance is not negligible in

All of these
 overhead transmission lines
 underground cable
 communication lines

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Power Systems
An over current relay, having a current setting of 125% connected to a supply circuit through a current transformer of ratio 400/5. The pick up value is

 15 A
 10 A
 12.5 A
 6.25 A

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Power Systems
The equation of area control error(ACE) is

 ACE = ΔPtie + b.Δf
 ACE = ΔPtie +1/ b.Δf
 ACE = ΔPtie - 1/b.Δf
 ACE = ΔPtie - b.Δf

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Power Systems
The draw back of NR method as compare to Gauss-Seidel method is/are?

 large number of iterations
 both 1 and 2
 large requirement of computer memory
None of these

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Power Systems
If R = 84 ohm/Km, G = 10-6 mho/Km, H = 0.01 H/Km, C = 0.061 μ F/Km and frequency = 1000 Hz, then what is the value of propagation constant of the transmission line

 None of them.
 0.018 per Km.
 0.09 + j 0.018 per Km.
 0.01 + j 0.02 per Km.

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