A) \[{{\left( \frac{{{R}_{2}}}{{{R}_{1}}} \right)}^{2}}\]
B) \[\frac{{{R}_{1}}}{{{R}_{2}}}\]
C) \[{{\left( \frac{{{R}_{1}}}{{{R}_{2}}} \right)}^{2}}\]
D) \[\sqrt{{{R}_{1}}{{R}_{2}}}\]
Correct Answer: B
Solution :
\[F=m\left( \frac{4{{\pi }^{2}}}{{{T}^{2}}} \right)R\]. If masses and time periods are same then \[F\propto R\] \ \[{{F}_{1}}/{{F}_{2}}={{R}_{1}}/{{R}_{2}}\]
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