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Power Systems

Power Systems
Normally Z bus matrix is a

 unit matrix
 sparse matrix
 null matrix
 full matrix

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Power Systems
Transmission line parameters of the short transmission line are

 1,Z,Y,1
 1,0,Y,1
 Z,0,Y,1
 1,Z,0,1

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Power Systems
Consider a long, two wire line composed of solid round conductors. The radius of both conductors is 0.25 cm and distance between their centers is 100 cm. If this distance is doubled, then the inductance per unit length.

  Increase but does not doubled.
 Decrease but does not halves.
 Doubled.
 Halves.

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Power Systems
For flat voltage profile system, voltage regulation is

 100%
 0%
 any of the above
 50%

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Power Systems
Mho relay is used for the protection of

 no length criterion.
  long transmission lines.
 short length lines.
 medium length lines.

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Power Systems
The positive (Z1), negative (Z2) and zero sequence (Z0) impedances of a transmission line follows the relation

 any of the above
 (Z1 = Z2) > Z0
 Z1 = Z2 = Z0
 (Z1 = Z2) < Z0

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