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Longitudinal Strain

A steel wire ...

Question

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.
The ratio of stresses developed in the two wires is:
$c o p p e r s t e e l$

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Solution

Stress $σ = \frac{F}{A}$ .
As both wire has same cross-section $(A)$ and same tension $F$ , so the ratio stresses $\frac{σ_{S}}{σ_{C}} = 1$ .

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