Question

Unit of surface tension is

• A. $N{m}^{-1}$
• B. $N{m}^{-2}$
• C. $N^2{m}^{-1}$
• D. $N{m}^{-3}$

Answer 1

The correct option is A $N{m}^{-1}$

The surface tension is defined as the force per unit lenth.

$T=\frac{F}{l}=N{m}^{-1}$