First slide

Elastic Modulie

Question

A copper wire and a steel wire of the same diameter and length are joined end to end and a force is applied which stretches their combined length by 1 cm. Then the two wires will have:

Easy

A

the same stress and strain
B

the same stress but different strains
C

the same strain but different stresses
D

different stresses and strains

Solution

e = $e_{1} + e_{2}$
as $A_{1} = A_{2}$
Force on both the wires is same
$\frac{F}{A_{1}} = {\frac{F}{A}}_{2}$

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