Question

Two wires of same length and same
radius (one of copper and another of
steel) are welded to form a long wire. An
extension of 3cm is produced in it on
applying a load at one of its ends. If the
young's modulus of steel is twice that of
copper, then the extension in the steel wire​

Answer 1

Answer:1.5 cm

Explanation:

Y of steel = F*l/A*dl

Y of copper = F*l/A*dl

Ys/Yc =2=3/x

x=1.5 cm