- Exam
- JEE Main
- Year
- 2024
- Date
- 27 January
- Shift
- Evening Shift
- Subject
- Physics
- Chapter
- Mechanical Properties of Solids
JEE Main 2024 · 27 January · Evening Shift · Physics · Mechanical Properties of Solids
Given below are two statements : one is labelled as Assertion (A)...
Assertion (A) : The property of body, by virtue of which it tends to regain its original shape when the external force is removed, is Elasticity.
Reason (R) : The restoring force depends upon the bonded inter atomic and inter molecular force of solid.
In the light of the above statements, choose the correct answer from the options given below :
Options
- A(A) is false but (R) is true
- B(A) is true but (R) is false
- CBoth (A) and (R) are true and (R) is the correct explanation (A)
- DBoth (A) and (R) are true but (R) is not the correct explanation of (A)
Correct answer
C. Both (A) and (R) are true and (R) is the correct explanation (A)
Step-by-step solution
Elasticity is the ability of a material to deform under stress and then return to its original shape when the stress is removed.
The restoring force in elastic materials is associated with the inter-atomic or inter-molecular forces that act to bring the atoms or molecules back to their original positions when the material is deformed. When an external force is applied to a material, it causes a displacement of atoms or molecules from their equilibrium positions. The restoring force is a result of the potential energy stored in these inter-atomic or inter-molecular bonds, and it works to bring the material back to its original state.
Hence, both (A) and (R) are true and (R) is the correct explanation (A)