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Power Systems

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

 10
 5
 100
 1

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Power Systems
For a 500 Hz frequency excitation, a 100 km long power line will be modelled as

 medium transmission line
 any of the above
 shunt capacitor
 long transmission line

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Power Systems
Critical disruptive voltage is a voltage at which

 both 1 and 2
 corona is just initiated
 nether 1 nor 2
 corona is visible with blue or violet colour

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Power Systems
Which of the following faults is/are treated as external faults?

 Failure of prime mover of the generator
 Failure of excitation
All of these
 Over voltage

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Power Systems
Differential relays does not used for which of the following faults?

 through faults
 both 1 and 2
 faults within a transformer
 faults within a generator

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Power Systems
What will be the thermal efficiency of a 240 V, 1000 W electric kettle if it brings 2 liters of water at 15° C to boiling point 15 Minutes

 78.96 %.
 80.25 %.
  74.56 %.
  79.33 %.

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