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Assertion For small deformations, the stress and strain are proportional to each other Reason A class of solids called elastomers does not obey Hooke's law.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Correct answer: Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

Solution

The assertion is true because, for sufficiently small deformations, many solids show a linear stress-strain relationship. The reason is also true since elastomers often have nonlinear behavior, but that does not explain why small deformations are proportional; it only gives an exception to Hooke’s law.

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