Power Systems
The characteristic impedance of a transmission on line is

 Inversely proportional to its length.
 Directly proportional to square root of its length.
 Directly proportional to its length.
  Independent of its length.

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Power Systems
Per unit of any quantity is defined as

 actual value of quantity /base value of quantity in same units
 base value of quantity /actual value of quantity in same units
 base value of quantity /actual value of quantity in different units
 actual value of quantity /base value of quantity in different units

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Power Systems
Which of following statement are false

  Nuclear power plants are used as peak load plants only.
 A thermal reactor needs a moderator material.
 In a nuclear reactor, multiplication factor is kept almost equal to one.
 In nuclear power plants, chain reaction is controlled by cadmium rods.

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