2. The work done in stretching an elastic wire per unit volume is or strain energy in a stretched string is
(a) Stress × Strain (b) (1/2)(Stress× Strain)
(c) 2× Stress × Strain (d) Stress/Strain
Answer-b
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a