A steel wire and a copper wire of equal length and equal cross- sectional area are joined end to end and the combination is subjected to a tension. Find the ratio of
copper/steel
(a) the stresses developed . In the two wires,
(b) the strains developed. (Y of steel `= 2xx10^(11) N//m^(2)` Y of copper `= 1.3xx10^(11) N//m^(2)`)

Explanation

`(a) 1 (b) (strai n i n copper wire )/(stra i n i n steel wire )=(20)/(13)`