Question

Dimensions of strain are

• A. $\left[\text{M}{\text{L}}^2{\text{T}}^{-2}\right]$
• B. $\left[{\text{M}}^0{\text{L}}^0{\text{T}}^0\right]$
• C. $\left[\text{M}{\text{L}}^{-1}{\text{T}}^{-2}\right]$
• D. $\left[\text{M}\text{L}{\text{T}}^{-2}\right]$

Answer 1

The correct option is B $\left[{\text{M}}^0{\text{L}}^0{\text{T}}^0\right]$

Strain is fractional change in dimension.

$e.g.$ strain $=\frac{\Delta l}{l}$. So, it is dimensionless.