A) 3.40%
B) 2.40%
C) 5.40%
D) 4.40%
Correct Answer: D
Solution :
l = 25.0 cm Time of 40 oscillation is 50 sec \[\therefore \,\,\,\,\,\,\,\,g=\frac{4{{\pi }^{2}}l}{{{T}^{2}}}\] \[\Rightarrow \,\,\,\,\,\,\,\frac{\Delta g}{g}=\frac{\Delta l}{l}+\frac{2\Delta T}{T}\] \[\Rightarrow \,\,\,\,\,\,\,\frac{\Delta g}{g}=\left( \frac{0.01}{25.0} \right)+2\left( \frac{1}{50} \right)\] \[\Rightarrow \,\,\,\,\,\,\,\left( \frac{\Delta g}{g}\times 100 \right)=4.4%\]
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