Youngs Modulus Elastic Modulus - Definition, Formula, Unit, FAQs

What is young’s modulus of elasticity? Or define young’s modulus or elastic modulus

The mechanical property of material to tolerate compression/elongation with its length is defined as Young’s modulus, also called as modulus of elasticity. Also, young’s modulus is defined as the ratio of stress to strain.

It’s symbolised by letters E or Y.

Young’s modulus is a mechanical property of linear elastic solids such as rods, wires, and other similar objects. Other quantities, such as Bulk modulus and shear modulus, can be used to determine a material's elastic properties, but Young’s modulus is the most widely utilised. When a specific load is applied to a solid object, it deforms. When the pressure is removed from an elastic object, the body returns to its previous shape. Beyond a small degree of distortion, many materials are not linear and elastic. Only linear elastic materials have a constant Young’s modulus.

Young’s modulus formula is a mathematical formula that is used to calculate the modulus of

E=σ/ϵ

From Other Quantities: E=Modulus Young's Formula

=FL0/AΔL

ϵ = ΔL/L0

• Young’s modulus formula E in Pa
• ? is the stress in Pa that is applied uniaxially.
• ϵ is the proportionate deformation or the strain
• The object under strain exerts a force called F.
• A is the cross-sectional area of the actual cross-section.
• L denotes the length variation.
• The true length is L0.

The ratio of stress and strain, which corresponds to the material's stress, determines the Young’s modulus of such a material. The relationship is seen in the table below.

E =, where E is the material's Youngs formula in N/m2, is the stress applied to the material, and is the strain corresponding to the applied stress in the material. With the value of Young’s modulus for a material, the rigidity of a body may be determined. This is because it reveals the body's ability to resist deformation when force is applied.

1. Young’s modulus of steel 200,
2. glass has a value of 65,
3. wood has a value of 13, and
4. plastic (polystyrene) has a value of 3.

Young’s modulus or elastic modulus factor-

We can assert that steel is more robust in nature than wood or polystyrene by studying its modulus of elasticity units, since it has a lower tendency to deform under applied load. Young’s modulus is also used to calculate how much a material will deform when subjected to a given load.

Another thing to remember is that the lower the Young’s modulus of a material, the greater the deformation experienced by the body, and in the case of clay and wood, this distortion might vary within a single sample. One part of the clay sample deforms more than the other, whereas a steel bar deforms evenly all the way around.

Also Read:

• NCERT solutions for Class 11 Physics Chapter Mechanical Properties of Solids
• NCERT Exemplar Class 11 Physics Solutions Chapter Mechanical Properties of Solids
• NCERT notes Class 11 Physics Chapter Mechanical Properties of Solids

Elasticity definition or define elasticity or what is elasticity?

Elasticity is a term used in economics to describe how the aggregate quantity demanded of a good or service changes in response to price changes in that good or service. If the quantity demand for a product fluctuates more than proportionally when the price changes, the product is said to be elastic. Modulus of elasticity formula is ratio of stress by strain.

Also check-

• NCERT Exemplar Class 11th Physics Solutions
• NCERT Exemplar Class 12th Physics Solutions
• NCERT Exemplar Solutions for All Subjects

NCERT Physics Notes:

• NCERT Notes Class 11th Physics
• NCERT Notes Class 12th Physics
• NCERT Notes For All Subjects