A force F applied on the wire of radius r and length L and change in the length of the wire is $$l$$. If the same force F is applied on the wire of the same material and radius 4r and length $$4l$$, then change in length of the other wire is,

Within the elastic limit, the corresponding stress is known as

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

The Poisson's ratio of a material is 0.1. If the longitudinal strain of a rod of this material is $$10^{-3}$$, then the percentage change in the volume of the rod will be