A copper bar of length `L` and area of cross section `A` is placed in a chamber at atmospheric pressure. If the chamber is evacuated, the percentage change in its volume will be (compressibility of copper is `8 xx 10^(-12) m^(2)//N` and `1 atm = 10^(5) N//m)`

Options

A. `8xx10^(-7)`
B. `8xx10^(-5)`
C. `1.25xx10^(-4)`
D. `1.25xx10^(-5)`

Answer

B

Explanation

`1/K=(/_\V//V)/(/_\P) ` or` (/_\V)/V=/_\P(1/K)`
or `(/_\V)/vxx100=10^(5)xx8xx10^(-12)xx10=8xx10^(-5)`