The SI unit of Young's modulus is
A$\text{N}$
B$\text{N m}^{-2}$
C$\text{N m}^{2}$
Ddimensionless
Answer & Solution
Correct answer: B. $\text{N m}^{-2}$
$Y = \text{stress}/\text{strain}$. Strain is dimensionless, so $Y$ has the units of stress: $\text{N m}^{-2}$ (i.e. Pa). The same goes for shear modulus $G$ and bulk modulus $K$.
Related questions
\n\nThe figure compares the s\n\nFor the spherical body su\n\nThe diagram above shows a\n\nThe area under the stress\n\nIn the stress-strain curvA wire of length $L$, area $A$ and Young's modulus $Y$ is stretched by hanging a mass $m$ A steel rod is clamped rigidly at both ends and then heated through a temperature rise $\DThe elastic potential energy stored per unit volume in a stretched wire (within the elasti