Which of the following is not a unit of energy? (1) joule (2) newton metre (3) kilowatt (4) kilowatt-hour

Answer: (3) kilowatt

In physics, we can define energy as the capacity to do work. The SI unit of energy is joules (J). kilowatt is the unit of power.

Various energy units

Energy units can be preceded by various factors and there are usually different units for measuring energy. Some common units include:

  1. British thermal unit (BTU)
  2. Horsepower
  3. Kilowatt-hour (kWh)
  4. Calorie
  5. Electronvolts (eV)
  6. Hartree (the atomic unit of energy)
  7. Rydberg units
  8. Barrel of oil

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