63. A copper wire and a steel wire of the same diameter and length are connected end to end and a force is applied, which stretches their combined length by 1 cm. The two wires will have
(a) Different stresses and strains
(b) The same stress and strain
(c) The same strain but different stresses
(d) The same stress but different strains
Answer-d
(12)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)