1.You are given three wires A, B and C, of the same length and cross-section. They are each stretched by applying the same force to the ends. The wire A is stretched least and comes back to its original length when the stretching force is removed. The wire B is stretched more than A and also comes back to its original length when the stretching force is removed. The wire C is stretched most and remains stretched even when stretching force is removed. The greatest Young s modulus of elasticity is possessed by the material of wire

2.The ratio of the adiabatic to isothermal elasticities of a triatomic gas is

3.The length of a wire is increased by 1 mm on the application of given load. In a wire of the same material, but of length and radius twice that of the first, on the application of the same load, extension is

4.Two wires of the same length and same material but radii in the ratio of 1 : 2 are stretched by unequal forces to produce equal elongation. The ratio of the two forces is

5.The dimensions of four wire of the same material are given below. In which wire the increase in length will be maximum ?