Answer:
We know that \[mvr=\frac{nh}{2\pi }\]
\[\Rightarrow \]\[V=\frac{nh}{2\pi }\times \frac{1}{mr}\]\[\Rightarrow \]\[v\propto \frac{n}{r}\]
(\[\because \] ‘h’ and ‘m’ are constants)
\[\Rightarrow \] \[\frac{{{v}_{1}}}{{{v}_{2}}}=\frac{{{n}_{1}}}{{{n}_{2}}}\times \frac{{{r}_{2}}}{{{r}_{1}}}\] \[\Rightarrow \] \[\frac{{{v}_{1}}}{{{v}_{2}}}=\frac{1}{2}\times \frac{{{r}_{2}}}{{{r}_{1}}}=\frac{{{r}_{2}}}{2{{r}_{1}}}\]
First orbit
Second orbit
\[{{n}_{1}}=1\]
\[{{n}_{2}}=2\]
\[{{r}_{1}}={{r}_{1}}\]
\[{{r}_{2}}={{r}_{2}}\]
\[{{v}_{1}}:{{v}_{2}}=?\]
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