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In the relation stress equals k times strain, the constant k is known as what?
APoisson ratio
BYield strength
CVolume strain
DElastic modulus
Answer & Solution
Correct answer: D. Elastic modulus
1. The constant fixes how much stress a given strain demands.
2. A stiffer material needs more stress for the same strain, so k is larger.
3. This proportionality constant is the modulus of elasticity.
_Source: NCERT Class 11 Physics, Ch 9 'Mechanical Properties of Solids'_
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