Power Systems
A transmission line has 50 km operating at frequency of 500 Hz. Find the type of the line?

 short transmission line
 any of the above
 medium transmission line
 long transmission line

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Power Systems
In a biased differential relay the bias is defined as the ratio of

  operating coil current and restraining coil current.
  fault current and operating coil current.
  fault current and restraining coil current.
  number of turns of restraining and operating coil.

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