Question
The stress-strain graphs for materials A and B are as shown in figure. Which of the material:
(i) has greater value of Young's modulus,
(ii) is more ductile or more brittle? 
Solution
(i) For graph A, slope of OE is more than that of graph B. Therefore, Young's modulus of material A is greater than that of B.
(ii) Material A shows wider plastic region than that of B. Thus, A is ductile than B and B is more brittle than A.
