Question

In plotting stress versus strain curves for two materials P and Q, a student by mistake puts strain on the y-axis and stress on the x-axis as shown in the figure. Then the correct statement(s) is (are)

• A. P has more tensile strength than Q
• B. P is more ductile than Q
• C. P is more brittle than Q
• D. The Young's modulus of P is more than that of Q

Answer 1

Answer: (A), (B)

P is more ductile than Q
P has more tensile strength than Q

P can have more stress than Q before failing after proportional limit, thus P is more ductile than Q. Hence B is correct and C is incorrect.
The breaking stress of P is more than of Q,hence P has more tensile strength than Q.
For same stress, strain in P is higher than Q, hence, stress/strain ratio i.e. young's modulus, will be lower for P thus option D is incorrect.