Test Preparation on Elasticity-Physics Test Series For NEET 2020

Two wires are made of the same material and have the
same volume. However wire 1 has cross-sectional area A
and wire 2 has cross-sectional area 3A. If the length of wire
1 increases by Dx on applying force F, how much force is
needed to stretch wire 2 by the same amount

The dimensions of four wires of the same material are given
below. In which wire the increase in length will be maximum
when the same tension is applied

Write Copper, Steel, Glass and Rubber in order of
increasing coefficient of elasticity