Question

two wires each of equal cross section One made up of Steel and other made up of copper are joined end to end​

Answer 1

Answer:

Solution :

As the cross sections of the wires are equal and same tension exists in both the stresses developed are equal. Lelt the origiN/Al lengths of the steel wire and the copper wire be LsandLc respectively and the elongation in each wire be l.

lLs= stress2.0 x 1011nm −2............i

lLc= stress1.1 × 101Nm −2............ii

Dividing ii by i

LsLc= 2.01.1 = 20:11