110. The area of cross section of a steel wire
The area of cross section of a steel wire (Y=2.0×1011 N/m2) is 0.1 cm2 . The force required to double its length will be
(a) 2×1012 N/m (b) 2×1011 N/m
(c) 2×1010 N/m (d) 2×106 N/m
Answer-d
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a