Question

The dimension J/m² can correspond to?

• A. Surface Energy
• B. Surface Energy per unit surface area
• C. Surface Tension
• D. Gravitational Potential Energy

Answer 1

Answer: (B), (C)

The correct options are
B

Surface Energy per unit surface area

C

Surface Tension

Option C can be directly verified,

Surface Energy is same energy which has to be in Joules
Similarly, surface area $\to$ $m^2$
$\Rightarrow \underset{surfaceenergy}{\overset{surfacearea}{\to }}\frac{J}{m^2}$
Now, surface Tension is force per unit length i.e. $\frac{F}{L}$ ,which can be modified as $\frac{F\times L}{L\times L^{\prime }}$ Right?
But $F\times L$ is work done which in term is measured in Joules
$\Rightarrow$ Surface tension can have a dimension of $\frac{J}{m^2}$
Hence b & c