Q .     A tension of `22 N` is applied to a copper wire of cross-sectional area `0.02 cm^2`. Young’s modulus of copper is `1.1xx10^11 N/m^2`and Poisson's ratio `0.32`. The decrease in cross sectional area will be :

EAMCET 2012
A

`2.56xx10^-6cm^2`

B

`1.6xx10^-6cm^2`

C

`1.28xx10^-6cm^2`

D

`0.64xx10^-6cm^2`

HINT

`Y= (Fxxl/(A(dell) ))`

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