A) \[{{n}^{2}}\] times
B) n times
C) 2n times
D) None of the above
Correct Answer: A
Solution :
\[l\propto \frac{FL}{{{r}^{2}}Y}\]Þ \[l\propto \frac{1}{{{r}^{2}}}\] \[\text{( }F,L\ \text{and }Y\text{ are constant)}\] \[\frac{{{l}_{2}}}{{{l}_{1}}}={{\left( \frac{{{r}_{1}}}{{{r}_{2}}} \right)}^{2}}={{(n)}^{2}}\Rightarrow {{l}_{2}}={{n}^{2}}{{l}_{1}}\]
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