25. The work per unit volume to stretch the length by 1% of a wire with cross sectional area of
25. The work per unit volume to stretch the length by 1% of a wire with cross sectional area of 1 mm2 will be (Y=9×1011 N/m2)
(a) 9×1011 J (b) 4.5×107 J
(c) 9×107 J (d) 4.5 ×1011 J
Answer-b
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a