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An aluminium wire and a steel wire of th...

An aluminium wire and a steel wire of the same length and cross-section are joined end- to-end. The composite wire is hung from a rigid support and a load is suspen-ded from the free end. If the increase in lengthe of the composite wire is 1.35 mm, find the ratio the (i) stress in the two wires amd (ii) strain in the two wires.
`(Y_(Al)=0.7xx10^(!1)Nm^(-2),Y_("steel")=2=10^(11)Nm^(-2))`

A

`1:1, 20:7`

B

`1:1, 10:7`

C

`20:7, 1:1`

D

`10:7, 1:1`

Text Solution

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The correct Answer is:
A
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