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Which of the following statements is correct for brittle materials.

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Which of the following statements is correct for brittle materials.

(a) It breaks soon after elastic limit is crossed

(b) It shows significant plastic deformation before breaking

(c) It is used to make wires

(d) Stress is never proportional to strain

The question was posed to me during an internship interview.

The above asked question is from Solids Mechanical Properties topic in portion Mechanical Properties of Solids of Physics – Class 11

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Right answer is (a) It breaks soon after elastic limit is crossed

Easiest explanation: Brittle materials break soon after elastic limit. They show no significant plastic deformation and hence can’t be used for making wires. Their stress-strain curve looks like:

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