Question

(b) The stress-strain graphs for materials A and B are shown in figure.
The graphs are drawn to the same scale.
(i) Which of the material has greater Young's modulus?
(ii) Which material is more ductile?
(iii) Which is more brittle?
(iv) Which of the two is stronger material?​

Answer 1

Explanation:

From Hooke's law, young's modulus Y=

Strain

Stress

Thus slope of Stress Vs Strain graph gives the value of Young's modulus of a material.

From the two graphs, we see that slope for material A is greater than for B. Thus material A has greater Young's modulus.

Also, Young's modulus is the measure of strength of the material. Greater the Young's modulus, greater is the force required to produce strain in it. Hence material A is stronger than material B.