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The unit of energy is
1. Newton
2. Kilogram
3. Watt
4. Joule

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Correct Answer - Option 4 : Joule



  • Energy is the capacity of doing work.
  • The SI unit of energy is Joule and dimensional unit is [ML2T-2].
  • It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms.
  • Energy in the process is transfer from one body to another.


  • As mentioned above, unit of energy is joule.
  • Newton is the unit of force.
  • Kilogram is the unit of mass.
  • Watt is the unit of power.

List of SI and CGS unit of some physical quantities are given below.

Physical Quantity SI Unit CGS Unit
Energy/Work/Heat joule erg
Force Newton Dyne
Mass Kilogram gram
Power Watt erg/sec

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