A copper wire of cross-section A is under a tension T. Find the decrease in the cross-section area. Young's modulus is Y and Poisson's ratio is σ

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 force F doubles the length of wire of cross-section a The Young modulus of wire is

A steel wire of length 4.7 m and cross-section 3.0 xx 10 ^(2) m ^(2) stretches by the same amount as a copper wire of length 3.5 m and cross-section 4.0x x 10^(2) m^(2) under a given load. What is the ratio of the Young.s modulus of steel to that of copper?

wire of length I has a ear mass density lambda and area of cross-section A and the Young's modulus y is suspended vertically from rigid support. The extension produced in wire due to its own weight

A ring of radius R is made of a thin wire of material of density rho , having cross-section area a and Young's modulus y. The ring rotates about an axis perpendicular to its plane and through its centre. Angular frequency of rotation is omega . The tension in the ring will be

A ring of radius R is made of a thin wire of material of density rho , having cross-section area a and Young's modulus y. The ring rotates about an axis perpendicular to its plane and through its centre. Angular frequency of rotation is omega . The ratio of kinetic energy to potential energy is

A load of 20kg is suspended by a steel wire. Its frequency when rubbed with a resigned cloth is found to be 20 times its freqency when plucked. Find the area of cross section of the wire. Young's modulus of steel is 19.6 xx 10^(10)N//m^2 .

Two wires have identical lengths and areas of cross-section are suspended by mass M . Their Young's modulus are in the ratio 2:5 .

If a force is applicable to an elastic wire of the material of Poisson's ratio 0.2 there is a decrease of the cross-sectional area by 1 % . The percentage increase in its length is :

A uniform ring of radius R and made up of a wire of cross - sectional radius r is rotated about its axis with a frequency f . If density of the wire is rho and young's modulus is Y . Find the fractional change in radius of the ring .