80. The extension of a wire by the application of load is 3 mm. The extension in a wire of the same material and length but half the radius by the same load is
(a) 12 mm (b) 0.75 mm
(c) 15 mm (d) 6 mm
Answer-a
(43)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)