Question

The unit of energy is

• A. Pascal
• B. Joule
• C. Kilo watt
• D. Richter

Hint:

Energy = Joule ($\text{J}$); Power = Watt ($\text{W} = \text{J/s}$); Pressure = Pascal ($\text{Pa} = \text{N/m}^2$).

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
In the International System of Units (SI), physical quantities are measured in standard derived and fundamental units.

Step 2: Detailed Explanation:
The SI unit of work and energy is the Joule ($\text{J} = \text{N}\cdot\text{m} = \text{kg}\cdot\text{m}^2/\text{s}^2$).
Pascal is the unit of pressure ($\text{N/m}^2$), Kilowatt ($\text{kW}$) is the unit of power (energy per unit time, $\text{J/s}$), and Richter is a seismic scale measuring earthquake magnitude.

Step 3: Final Answer:
Therefore, the unit of energy is the Joule.