What is the SI unit of modulus of elasticity of a substance?
Correct answer: C. Nm^-1
- A. Nm^-2
- B. Jm^-2
- C. Nm^-1
- D. Being a number, it has no unit
Explanation
The modulus of elasticity, also known as Young's modulus, measures the stiffness of a material. It is defined as the ratio of stress to strain within the elastic limit of the material. The SI unit of modulus of elasticity is Newton per square meter (Nm^-2) or Pascal (Pa). Therefore, option c) Nm^-1 is the correct SI unit for modulus of elasticity.
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