A thick wire of density `rho` and l is hung from a rigid support .Young's modulus of the material of wire is Y.What is the increases in length of the wire due to its own weight?

What is the effect on resistance, if the length of wire is increased

A wire of length l and cross selection area a is made of material of Young's modulus Y.If the wire is stretched by an amount x,find the work done.

A wire of length L and radius r is clalmped rigidly at one end. When the other end of the wire is pulled by force f, its length increaes by l. Another wire of the same material of length 2 L and radius 2 r, is pulled by a force 2 f. Find the increase in length of this wire.