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Point D on the stress-strain curve, the highest stress a metal can take, is its:
AFracture point stress
BUltimate tensile strength
CProportional limit
DYield point stress
Answer & Solution
Correct answer: B. Ultimate tensile strength
1. Beyond D more strain appears even with less force.
2. D marks the peak of the curve.
3. It is the ultimate tensile strength.
_Source: NCERT Class 11 Physics Part II, Chapter 9, Mechanical Properties of Solids._
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