Power Systems
The characteristic impedance of a transmission on line is

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

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Power Systems
In hydroelectric power plants

 operating cost is high and initial cost is low.
  operating cost is low and initial cost is high.
 both operating and initial cost are low.
 both operating and initial cost are high.

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