Young’s modulus is defined as the ratio of longitudinal stress to longitudinal strain (๐ธ = ๐/๐).
The CBSE syllabus for 2024-2025 includes Chapter 8 “Mechanical Properties of Solids” from the Class 11 NCERT Physics textbook. This chapter covers essential concepts like stress, strain, elasticity, Youngโs modulus, bulk modulus, shear modulus and Poissonโs ratio. It explains how solids deform under different types of forces and the factors that influence their mechanical properties. Multiple-choice questions help assess understanding of these principles such as Hookeโs Law and the stress-strain relationship. Understanding these concepts is crucial for both academic knowledge and real-life applications in various fields like engineering and materials science.
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The ratio of longitudinal stress to longitudinal strain is called Young’s Modulus or the Modulus of Elasticity. It is a measure of the stiffness of a material and is expressed mathematically as:
\[
E = \frac{\text{Longitudinal Stress}}{\text{Longitudinal Strain}}
\]
Where:
– \(E\) is Young’s Modulus (typically measured in pascals, Pa).
– Longitudinal stress is the force applied per unit area (\(\sigma = \frac{F}{A}\)).
– Longitudinal strain is the deformation per unit length (\(\varepsilon = \frac{\Delta L}{L}\)).
Young’s Modulus is a fundamental property of materials, determining how they deform under tensile or compressive loads.
This question related to Chapter 8 physics Class 11th NCERT. From the Chapter 8. Mechanical Properties of Solids. Give answer according to your understanding.
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