question_answer

Two wires of different materials are suspended from a rigid support. They have the same length and diameter and carry the same load at their free ends. (a) Will the stress and strain in each wire be the same? (b) Will the extension in both wires be the same?

Answer:

                (a) Stress in both the wires is the same as both the wires have the same diameter and carry the same load at their free ends. Strain will be different in the two wires as the wires are of different materials, even though the stress is the same. (b) Because the original lengths of the two wires are equal and strains produced in them are different, hence extensions in the two wires will not be same.