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 \[\Delta x\] on applying force F, how much force is needed to stretch wire 2 by the same amount ?

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

A wire suspended vertically from one of its ends is stretched by attaching a weight of 200 N to the lower end. The weight stretches the wire by 1mm, then elastic energy stored in wire is :

The dimensions of two wires A and B are same but their materials are different. Their load extension graphs are shown if \[y_{A} and y_{B}\] are the values of young’s modulus of elasticity of ‘A and ‘B’ respectively then :

If \[\rho\] is density of the material of a wire and \[\sigma\] is the breaking stress, the greatest length of the wire that can hang freely without breaking is :

Two wires of the same material & length but diameters in the ratio 1 : 2 are stretched by the same force. The potential energy per unit volume for the two wires when stretched will be in the ratio :