Figure shows the stress-strain graphs for materials .`A` and `B`. From the graph it follows that

Options

A. material A has a higher Young’s modulus
B. material B is more ductile
C. material A can withstand greater stress
D. material B can withstand greater stress

Answer

AC

Explanation

The slope of the linear portion of the curve gives the Young’s modulus of the material. The slope of the linear portion OP for material A is greater than that of the linear portion OR for material B. Hence, statement (A) is correct. The plastic region for material A (from P to Q) is greater than that (from R to S) for material B, which indicates that material A is more ductile. Hence, statement (B) is in correct. The breaking stress for material B in (i.e., stress corresponding to point S) is less than that for material A (i.e., stress corresponding to point Q), hence material A is stronger than material B.