Exams › JEE Main › Physics

The figure shows stress-strain graphs (drawn to scale) for two materials A and B. From the graphs, the ratio of the Young's modulus of A to that of B is:

1. 37:53
2. 53:37
3. 1:1
4. 37:90

Correct answer: 53:37

Solution

Young's modulus is the slope of the stress-strain line; the steeper line (A) gives the larger modulus, so the ratio Y_A: Y_B is 53:37.

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 →