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Power Systems

Power Systems
Find the propagation constant, if impedance is 10Ω and admittance is 10 â„§?

 100
 5
 1
 10

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Power Systems
When reactance grounding is used in network, the voltage between neutral and ground is

 IR0 × Xn
 IN × Xn
 both 1 and 3
 3×IR0 × Xn

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Power Systems
String efficiency depends upon

 no. of SCR in the string.
  all of these.
 voltage rating of whole string.
 voltage rating of one SCR.

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

 communication lines
 underground cable
All of these
 overhead transmission lines

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Power Systems
Area under the daily curve divided by 24 gives

 maximum load
 units generated
 average load
 maximum demand

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Power Systems
For 800 MJ stored energy in the rotor at synchronous speed, what is the inertia constant H for a 50 Hz, four pole turbo generator rated 100 MVA, 11 kV?

 8 MJ/MVA
 4 MJ/MVA
 6 MJ/MVA
 2 MJ/MVA

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