Read the following two statements below carefully and state, with reasons, if it is true or false.
(i) The Young’s modulus of rubber is greater than that of steel
(ii) The stretching of a coil is determined by its shear
modulus.
(i) False, because more stress is required to produce same strain in steel wire in comparison to a rubber wire. Therefore, Young’s modulus of steel is greater than that of rubber.
(ii) True, because when a coil is stretched, there is neither a change in its length nor a change in its volume and change takes place only in its shape. Therefore, stretching of a coil is determined by its shear modulus