An Aluminium and Copper wire of same cross sectional area but having lengths in the ratio 2: 3 are joined end to end. This composite wire is hung from a rigid support and a load is suspended from the free end. If the increase in length of the composite wire is 2.1 mm, the increase in lengths of Aluminium and Copper wires are: [Y_(Al)=20xx10^(11)N//m^(2) and Y_(CU) = 12xx10^(11)N//m^(2)]

An Aluminium and Copper wire of same cross sectional area but having l

1.	An Aluminium and Copper wire of same cross sectional area but having lengths in the ratio 2: 3 are joined end to end. This composite wire is hung from a rigid support and a load is suspended from the free end. If the increase in length of the composite wire is 2.1 mm, the increase in lengths of Aluminium and Copper wires are: [Y_(Al)=20xx10^(11)N//m^(2) and Y_(CU) = 12xx10^(11)N//m^(2)]
Answer» 1.0 MM, 1.1 mm 0.6 mm, 1.5 mm 0.7 mm, 1.4 mm 0.9 mm, 1.2 mm ANSWER :2