Q. 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
Explanation
Young’s modulus $Y = \frac{stress}{strain} = {N/m}^{2}$ or pascal (in SI system) And $Y = \frac{dyne}{{cm}^{2}}$ (in CGS system) Then, ${Nm}^{- 1}$ is not the unit of Young’s modulus.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.