6. There are two wires of same material and same length while the diameter of second wire is 2 times the diameter of first wire, then ratio of extension produced in the wires by applying same load will be
(a) 1 : 1 (b) 2 : 1
(c) 1 : 2 (d) 4 : 1
Answer-d
(5)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)