In determine of youggn modulus of ealsticity of wire, a force is applied and extension is recoreded. Initial length of wire `'1m'` . The curce between extension and stress is depicted then young modulus of wire will be:

Options

A. `2xx10^(9) N//m^(2)`
B. `1xx10^(9) N//m^(2)`
C. `2xx10^(10)N//m^(2)`
D. `1xx10^(10) N//m^(2)`

Answer

A

Explanation

`Delta1=(Fl)/(Ay) ,(Deltal)/((F//A))=l/y`=slope of curve
`l/y=((4-2)xx10^(-3))/(400xx10^(3))`
Given `1=1m to y=(4000xx10^(3))/(2xx10^(-3))`
`=2xx10^(9)N//m^(2)`