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Q. 30: What should be the weight
from the end of a steel wire 2m in length and
2mm in diameter to increase the length by
1mm ? (Y = 19 × 1011 N/m²)
(a)
30 kg wt
(b)
305 kg wt
(c)
22 kg wt
(d)
38.5 kg wt

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