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Reactive energy is metered separately for large consumers because

  • A.the active energy meter registers it as well and the two must be separated
  • B.reactive energy cannot be generated at the power station at all
  • C.the tariff for reactive energy is higher than that for active energy
  • D.it causes losses in the network without doing useful work

Answer: D

Reactive current heats conductors and occupies the capacity of transformers and cables while transferring no net energy, so the supply charges for it or penalises a poor power factor. An active energy meter reads nothing from it, which is why a separate meter is needed.

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