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  4. Two electrons revolving around a nucleus at distance 'r' and '4r'. The ratio of their time period is

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Q. Two electrons revolving around a nucleus at distance 'r' and '4r'. The ratio of their time period is

NTA AbhyasNTA Abhyas 2022

Solution:

$T^{2} \propto r^{3}$
$\frac{T_{r}}{T_{4 r}}=\left(\frac{r}{4 r}\right)^{3 / 2}$
$=\frac{1}{8}$