Q172 / 200 · Manipal (MET) 2012 · Physics

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
  • Correct answer
    B
    the same stress but different strains
  • C
    the same strain but different stresses
  • D
    different stresses and strains

Solution

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.

Hence, the correct answer is option: 'B'.

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