1.

The work per unit volume to stretch the length by 1% of a wire with cross sectional area of \[1\,m{{m}^{2}}\] will be. \[[Y=9\times {{10}^{11}}\,N/{{m}^{2}}]\]                                       [RPET 1999]

A. \[9\times {{10}^{11}}\,J\]
B. \[4.5\times {{10}^{7}}\,J\]
C. \[9\times {{10}^{7}}J\]
D. \[4.5\times {{10}^{11}}\,J\]
Answer» C. \[9\times {{10}^{7}}J\]


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