Power Systems
A transmission line has an impedance of (2+j6) Ω has voltage regulation of 10% at a load power factor of 0.8 lag. Find the voltage regulation for a load of 0.6 lead

 -6.92%
 6.92%
 -10%
 10%

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

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

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