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Power Systems

Power Systems
Condition for zero voltage regulation is

 tanφ = X/R
 cosφ = R/X
 tanφ = R/X
 cosφ = X/R

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Power Systems
In a 4*4 Y bus matrix the number of non zero elements are 12. Find the sparsity of the system?

 0.5
 0.75
 1
 0.25

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Power Systems
Area under the daily curve divided by 24 gives

 maximum load
 units generated
 maximum demand
 average load

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Power Systems
A 3 core cable gives on test a capacitance of 3.7 µF between two cores. Find the line charging current of the cable when it is connected to 11 kV, 50 Hz system?

 14.7 mA.
 1.476 A.
  14.76 A.
 1 A.

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Power Systems
A 3-phase transmission line has its conductors at the corners of an equilateral triangle with side 3m. The diameter of each conductor is 1.63 cm. The inductance of the line per phase per km is

 1.043 mH
 1.182 mH
 1.093 mH
 1.232 mH

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Power Systems
One fission of U235 releases energy of

  200 MeV.
 335 MeV.
 435 MeV.
 525 MeV.

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