Question

The dimensional formula for Youngs modulus is:

• A. $M{L}^{-1}{T}^{-2}$
• B. $M^{0}L{T}^{-2}$
• C. $ML{T}^{-2}$
• D. $M{L}^2{T}^{-2}$

Answer 1

Answer: (A)

The formula for the Young's modulus
$Y=\frac{\text{ stress }}{\text{ strain }}$
Dimensions of $Y=\frac{M{L}^{-1}{T}^{-2}}{M^0{L}^0{T}^0}$
$=M{L}^{-1}{T}^{-2}$