Question

A copper wire is stretched by a 10N force. If the radius of the wire is decreased by 2%, how will the Young’s modulus of wire be affected?

Answer 1

Young's is a property of the material of construction of a wire. It depends only on the nature of the material used for making the wire. Young's modulus does not depend on the physical dimensions such as the length and diameter of wire. Thus there will be no change in Young's modulus by merely decreasing the radius by 2%, without changing the basic nature of the material used for making the wire.

Please note that the Young's modulus depends on the chemical composition of the various ingredients present in the material.

Thus there will be no change in Young's modulus