66. wo wires of the same material have lengths in the ratio 1 : 2 and their radii are in the ratio
Two wires of the same material have lengths in the ratio 1 : 2 and their radii are in the ratio 1:√2 . If they are stretched by applying equal forces, the increase in their lengths will be in the ratio
(a) 2: √2 (b) √2:2
(c) 1 : 1 (d) 1 : 2
Answer-d
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a