
What is the SI unit of modulus of elasticity?
A) $pascal$
B) $kg.m/{s^2}$
C) $N/m$
D) $kg.m$
Answer
139.5k+ views
Hint: SI unit, also called the international system of unit is the only system of measurement with official status in almost every country in the world. There are seven SI base units namely, second (s), meter (m), kilogram (kg), ampere (A), kelvin (K), mole (mol), and candela (cd). Other than this all the SI units are SI derived units. Pascal is also an SI derived unit of pressure which is used to measure internal pressure.
Complete answer:
First let us define the modulus of elasticity. The modulus of elasticity is the measure of an object’s or substance’s resistance to being deformed elastically when stress is applied. The modulus of elasticity is a constant for a specific material. A higher modulus of elasticity means stiffer material. The modulus of elasticity is defined as the ratio of the stress in the material and the strains caused by the force.
$\therefore E = \dfrac{\sigma }{\varepsilon } = cons$
Where stress is the force causing the deformation divided by the area to which the force is applied which is the definition of pressure and strain is the ratio of the change in some parameter caused by the deformation to the original value of the parameter. If stress is measured in pascal, then since the strain is a dimensionless measure, the SI unit of $E$ will be pascal. The symbol of the SI unit pascal is $Pa$ .
Note: Not to be confused between pressure and stress let us define both the terms. The pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. On the other hand, the stress is the physical quantity that expresses the internal forces that neighboring particles of a continuous material exert on each other.
Complete answer:
First let us define the modulus of elasticity. The modulus of elasticity is the measure of an object’s or substance’s resistance to being deformed elastically when stress is applied. The modulus of elasticity is a constant for a specific material. A higher modulus of elasticity means stiffer material. The modulus of elasticity is defined as the ratio of the stress in the material and the strains caused by the force.
$\therefore E = \dfrac{\sigma }{\varepsilon } = cons$
Where stress is the force causing the deformation divided by the area to which the force is applied which is the definition of pressure and strain is the ratio of the change in some parameter caused by the deformation to the original value of the parameter. If stress is measured in pascal, then since the strain is a dimensionless measure, the SI unit of $E$ will be pascal. The symbol of the SI unit pascal is $Pa$ .
Note: Not to be confused between pressure and stress let us define both the terms. The pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. On the other hand, the stress is the physical quantity that expresses the internal forces that neighboring particles of a continuous material exert on each other.
Recently Updated Pages
How to find Oxidation Number - Important Concepts for JEE

How Electromagnetic Waves are Formed - Important Concepts for JEE

Electrical Resistance - Important Concepts and Tips for JEE

Average Atomic Mass - Important Concepts and Tips for JEE

Chemical Equation - Important Concepts and Tips for JEE

Concept of CP and CV of Gas - Important Concepts and Tips for JEE

Trending doubts
JEE Main 2025 Session 2: Application Form (Out), Exam Dates (Released), Eligibility, & More

JEE Main 2025: Derivation of Equation of Trajectory in Physics

Learn About Angle Of Deviation In Prism: JEE Main Physics 2025

Electric Field Due to Uniformly Charged Ring for JEE Main 2025 - Formula and Derivation

JEE Main 2025: Conversion of Galvanometer Into Ammeter And Voltmeter in Physics

Degree of Dissociation and Its Formula With Solved Example for JEE

Other Pages
Units and Measurements Class 11 Notes: CBSE Physics Chapter 1

JEE Advanced Marks vs Ranks 2025: Understanding Category-wise Qualifying Marks and Previous Year Cut-offs

NCERT Solutions for Class 11 Physics Chapter 1 Units and Measurements

Motion in a Straight Line Class 11 Notes: CBSE Physics Chapter 2

Important Questions for CBSE Class 11 Physics Chapter 1 - Units and Measurement

NCERT Solutions for Class 11 Physics Chapter 2 Motion In A Straight Line
