The diagram show stress versus strain curve for the materials A and B. From the curves we infer that
Options

Question

The diagram show stress versus strain curve for the materials A and B. From the curves we infer that

G1 Physics · Accepted Answer

Use stress σ=F/A, strain ε=ΔL/L and Young's modulus Y=σ/ε. For a uniform segment, ΔL=FL/(AY); for thermal restraint, thermal strain αΔT produces stress YαΔT. Evaluating the given data/statements gives B: A is ductile and B is brittle. Therefore the correct answer is B.