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Thermal Expansion

A copper wire...

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.

A

the same stress and strain

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B

the same stress but different strains

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C

the same strain but different stresses

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D

different stresses and strains

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Solution

The correct option is A the same stress and strain
As same force is applied to each wire having equal area of cross-section, so stress is same but extensions will be different for wires of different materials. So, same stress but different strains are there.

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