Exams › JEE Main › Physics

A student plotting stress-strain graphs for two materials P and Q accidentally puts strain on the y-axis and stress on the x-axis (as shown in the figure). Based on such a (swapped-axis) plot, which of the following statements is/are correct?

1. P has more tensile strength than Q
2. P is more ductile than Q
3. P is more brittle than Q
4. Young's modulus of P is greater than that of Q

Correct answer: P has more tensile strength than Q

Solution

With stress on the x-axis, the curve that reaches the larger stress value has greater tensile strength; for this standard problem P reaches higher stress, so P has more tensile strength than Q (this is the accepted correct statement).

Related JEE Main Physics questions

• Select the incorrect statement.
• A steel wire has length l and cross-sectional area A. When a certain load is applied, it elongates by 1 cm. If the same load is now applied to another steel wire made of the same material, having twice the length and half the cross-sectional area, what will be its extension?
• For common metals such as aluminium and copper, which sequence correctly represents the relative magnitudes of the elastic moduli?
• A steel sheet fails under a shear stress of 3.5 × 10⁸ N m⁻². The approximate force required to punch a circular hole of diameter 1 cm through a steel plate 0.3 cm thick is:
• A copper wire of fixed volume V is stretched out to a length l. If a constant force F is applied to this wire and it elongates by Δl, which of the following plots would be a straight line?
• A material has Poisson’s ratio equal to 0.5. When a tensile force is applied to a wire made of this material, its cross-sectional area decreases by 4%. The corresponding percentage increase in its length is:

⚔️ Practice JEE Main Physics free + battle 1v1 →