The graph shows the behaviour of a length of wire in the region for which the substance obeys Hook’s law. $P$ and $Q$ represent

The load versus strain graph for four wires of the same material is shown in the figure. The thickest wire is represented by the line

The stress versus strain graphs for wires of two materials $A$ and $B$ are as shown in the figure. If ${Y_A}$ and ${Y_B}$ are the Young ‘s modulii of the materials, then

The adjacent graph shows the extension $(\Delta l)$ of a wire of length $1m$ suspended from the top of a roof at one end with a load $W$ connected to the other end. If the cross sectional area of the wire is ${10^{ – 6}}{m^2},$ calculate the young’s modulus of the material of the wire

The value of force constant between the applied elastic force $F$ and displacement will be