Question

Which one of the following is not a unit of Young's modulus ?

• A. $Nm^{-1}$
• B. $Nm^{-2}$
• C. dyne $cm^{-2}$
• D. Mega Pascal

Answer 1

Answer: (A)

$Nm^{-1}$

Answer 2

$y=\frac{\text { stress }}{\text { strain }}= N / m ^{2}$ or pascal (in SI system) and $y=\frac{\text { dyne }}{ cm ^{2}}$ (in CGS. system) Thus, $Nm ^{-1}$ is not the unit of Young's modulus