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Excessive voltage drop in a long feeder wastes energy and also

  • A.raises the power factor of the load
  • B.reduces the current the load draws
  • C.improves the efficiency of the cable feeding it
  • D.reduces the torque available from motors at its far end

Answer: D

An induction motor's torque falls with the square of the voltage, so it draws more current to deliver the same output and heats itself further. Correcting the drop therefore addresses efficiency and reliability together.

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