39. A steel wire is stretched with a definite load. If the Young’s modulus of the wire is Y. For decreasing the value of Y
(a) Radius is to be decreased
(b) Radius is to be increased
(c) Length is to be increased
(d) None of the above
ANSWER-D
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a