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Choose the correct alternative (a), (b),...

Choose the correct alternative (a), (b), (c) or (d) for each of the questions given below :
A copper and a steel wire having same length and diameter are joined end-to-end. When a force is applied at the end of the wire, the net length of the wire increases by 1 cm. The wires will have :`

A

same stress and same strain

B

different stresses and different strain

C

different stresses and same strain

D

different strains and same stess

Text Solution

Verified by Experts

The correct Answer is:
D
Stress = `"Force"/"Area"`
In this case force applied and area of wire are same. Therefore stress has to be the same.
Strain = `"Stress"/Y`
Here, Y = Young.s Modulus
Young.s Modulus of steel wire is greater than copper wire.
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