A) \[70\,\,N/m\]
B) \[7\,\,\times \,\,{{10}^{-\,2}}\,N/m\]
C) \[7\,\,\times \,\,{{10}^{3}}\,N/m\]
D) \[7\times {{10}^{2}}\,N/m\]
Correct Answer: B
Solution :
\[1\,\,dyne\,\,=\,\,{{10}^{-5}}\,Newton,\,\,1\,cm\,\,=\,\,{{10}^{-2}}\,m\] \[70\,\frac{dyne}{cm}\,\,=\,\,\frac{70\times {{10}^{-5}}}{{{10}^{-2}}}\,\frac{N}{m}\,\,=\,\,7\times {{10}^{-2}}\,N/m\,\,\]
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