Home › CBSE Class 11 › Physics › Mechanical Properties of Solids › \n\nIn the stress-strain curve of a ductile material shown above, the point marked **E** corresponds to the
Aproportional limit (Hooke's law boundary)
Byield point (onset of plastic flow)
Cultimate tensile strength (maximum stress)
Dfracture point (where the wire snaps)
Answer & Solution
Correct answer: D. fracture point (where the wire snaps)
The labelled sequence on the cheat sheet is O→A (proportional limit), B (elastic limit/yield point), C–D (yield plateau, plastic region), D (ultimate tensile strength, maximum stress) and finally **E (fracture point)** — the stress at which the specimen actually breaks. Past D the stress can drop (necking) before final fracture at E.
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