A) \[9%\]
B) \[7%\]
C) \[4%\]
D) \[2%\]
Correct Answer: A
Solution :
\[g=\frac{4{{\pi }^{2}}\ell }{{{T}^{2}}}\] \[\frac{\Delta g}{g}=\frac{\Delta \ell }{l}+\frac{2\Delta T}{T}\]each term in rhs is positive because error always increases in each step of calculation \[\frac{\Delta g}{g}\times 100=\frac{0.1}{10}\times 100+2\times \frac{0.02}{0.5}\times 100\] \[=1+8=9%\]
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