Question

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

Answer 1

Correct Answer - Option 4 : Joule

Concept:

Energy:

• 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.

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Explanation:

• 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.

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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