AIIMS 2019 Physics Elasticity MCQ Question
Assertion : Identical springs of steel and copper are equally stretched. More work will be done on the steel spring.
Reason : Steel is more elastic than copper.
If both assertion and reason are true and reason is correct explanation of assertion
If both assertion and reason are true and reason is not correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
The statement correctly identifies that the work done to stretch a material is proportional to the stress and strain, with the relationship . Since steel has a higher modulus of elasticity (E) than copper, it requires more energy (work) to achieve the same amount of strain, making option A the correct choice. Other options are not applicable as they do not provide relevant information or alternative explanations regarding the work done in stretching materials. Understanding this concept is crucial for grasping the mechanical properties of materials and their responses to applied forces.
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