Question

Which are of the following is the young's modulus (in N/m²) for the wire having the stress strain curve in the figure. 

(A) 24 × 10¹¹ 

(B) 8.0 × 10¹¹ 

(C) 10 × 10¹¹ 

(D) 2.0 × 10¹¹

Answer 1

Correct option: (D) 2.0 × 10¹¹

Explanation: 

In the elastic region, Young's modulus is defined and

Y = [(stress) / (strain)]

Y = {(8 × 10⁷) / (4 × 10^–4)} = 2 × 10¹¹ N/m²