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CGP EDU Academic Team
Published on: September 12, 2026
Unit of energy in SI system is
Text Solution
Verified by ExpertsThe correct answer is:
C
To determine the correct unit of energy in the International System of Units (SI):
Therefore, the SI unit of energy is the Joule.
Correct Option: C
- Erg: It is the unit of energy in the CGS (Centimetre-Gram-Second) system. ($1\text{ J} = 10^7\text{ ergs}$)
- Calorie: It is a non-SI metric unit of heat energy commonly used in chemistry and nutrition. ($1\text{ cal} \approx 4.184\text{ J}$)
- Joule: It is the standard SI unit of energy and work. It is defined as $1\text{ Joule} = 1\text{ kg}\cdot\text{m}^2\text{/s}^2 = 1\text{ N}\cdot\text{m}$.
- Electron volt (eV): It is a unit of energy commonly used in atomic, nuclear, and particle physics. ($1\text{ eV} = 1.602 \times 10^{-19}\text{ J}$)
Therefore, the SI unit of energy is the Joule.
Correct Option: C
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