Young’s modulus of the material of a wire of length ‘L’ and radius ‘r’ in ‘Y’ \[N/m^{2}\]. If the length in reduced to L/2 and radius to r/2, the Young modulus will be :
The load versus elongation 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 \[Y_{A}andY_{B}\] are the Young’s modulus of the materials then :
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 :
