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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

(39)

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