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

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the same strain but different stresses

different stresses and strains

the same stress and strain

the same stress but different strains

answer is B.

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Detailed Solution

Since $M L = P t \Rightarrow L = \frac{P t}{M}$

As the area of cross section and force applied are equal, the stress will be equal.

As the wires have different young's modulus, the strain in the wires will be different.

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