N number of wires of equal length but of young modulii Y,2Y,3Y,4Y,...NY and cross sectional areas A,2A,3A,4A ... NA are connected in parallel supporting a load of mass M. Effective young's modulus of the composite wire is

A wire 3m long and having cross - sectional area of 0.42m^(2) is found to stretched by 0.2 m under a tension of 1000 N. The value of young's modulus for the material of the wire is

A wire of natural length l, young's modulus Y and ares of cross-section A is extended by x. Then, the energy stored in the wire is given by

Two wires have identical lengths and areas of cross-section are suspended by mass M . Their Young's modulus are in the ratio 2:5 .

A wire of length L and cross sectional area A is made of a material of Young's modulus Y. If the wire is streched by an amount x, the work done is………………

Two wires of different materials each of length l and cross sectional area 'A' are joined in series to form a composite wire. If their young's moduli are Y and 2Y, the total elongation produced by applying a force F to stretch the composite wire will be

A copper wire and a steel wire of same length and same cross-section are joined end to end. The compositive wire is hung from a rigid support and a load is suspended form the free end. The increase in length of the compositive wire is 4 mm. The increase in copper wire will be (Y_(copper)=1.2xx10^(11)N//m^(2),Y_(steel)=2xx10^(11)N//m^(2))

Two wires of equal dimensions and young's modulus Y_1 and Y_2 are connected end to end. What is the equivalent young's modulus for the combination?

A steel wire is stretched with a definite load. If the Young's modulus of the wire is Y. For decreasing the value of Y