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GK QUESTION#3107

Which is the conventional commercial billing unit of electrical energy?

  1. AWatt-hour
  2. BWatt per hour
  3. CKilowatt hourCorrect answer
  4. DKilowatt per hour
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Answer

C. Kilowatt hour

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Explanation

The kilowatt-hour is the conventional commercial billing unit of electrical energy.1 kWh=1000 W×3600 s=3.6×10⁶J. Watt and kilowatt measure power; watt per hour describes a rate of change of power.

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