Which one of the following substances possesses the highest elasticity?

S.I unit of stress is

A wire is stretched to double of its length. The strain is

A and B are two steel wires and the radius of A is twice that of B. If they are stretched by the same load, then the stress on B is ____.

Two wires of the same material have radii $r_{A}r\_A$ and $r_{B}r\_B$ respectively. The radius of wire A is thrice the radius of wire B. If they are stretched by same load then stress on wire B is ___

The length of a wire increases by 1% by a load of 2 kg wt. The linear strain produced in the wire will be

A wire of length ‘L’, radius ‘r’ when stretched with a force ‘F’ changes in length by l’. What will be the change in length of a wire of same material having length ‘2L’ radius ‘2r and stretched by a force ‘2F’?

A force of 100 N produces a change of 0.1% in a length of wire of area of cross section 1 $m{m}^{2}mm^2$ . Young’s modulus of the wire is ____

A copper wire $(Y=1\times 10^{11}N\mathrm{/}{m}^2)(Y=1\backslash times10^\{11\}\; N/m^2)$ of length 6 m and a steel wire $(Y=2\times 10^{11}N\mathrm{/}{m}^2)(Y=2\backslash times10^\{11\}\; N/m^2)$ of length 4 m each of cross-section $10^{-5}{m}^{2}10^\{-5\}m^2$ are fastened end to end and stretched by a tension of 100 N. The elongation produced in the copper wire is

When a force is applied to the free end of a metal wire, metal wire undergoes