A copper wire of cross sectional asrea 0.01 cm is under a tension of 20 N. Find the decrease in the cross sectional area. Young modulus of copper `=1.1xx10^11Nm^-2` and Poisson ratio 0.32.

A copper wire of cross sectional area 0.01 cm^2 is under a tension of 20 N . Find the decrease in the cross sectional area. Young modulus of copper =1.1xx10^11Nm^-2 and Poisson ratio 0.32 .

A copper wire of cross sectional area 0.01 cm^2 is under a tension of 20 N . Find the decrease in the cross sectional area. Young modulus of copper =1.1xx10^11Nm^-2 and Poisson ratio 0.32 .

A copper wire of cross -sectional area 0.01 cm^2 is under a tension of 22N. Find the percentage change in the cross- sectional area. (Young's modulus of copper = 1.1 xx 10^(11) N//m^2 and Poisson's ratio = 0.32 )

A copper wire of cross-section A is under a tension T .Its Young's modulus is Y and Poisson's ratio sigma .The decrease in cross-section of wire will be

A tension of 20 N is applied to a copper wire of cross sectional area 0.01 cm^(2) , Young's modulus of copper is 1.1 xx 10^11N//m^(2) and Poisson's ratio is 0.32. The decrease in cross sectional area of the wire is

A copper wire and a steel wire of radii in the ratio 1:2, lengths in the ratio 2:1 are stretched by the same force. If the Young's modulus of copper = 1.1 xx 10^11Nm^(-2) find the ratio of their extensions (young's modulus of steel = 2 xx 10^11 N//m^2) .