4

I have a simple following code:

\begin{tikzpicture}
\draw[thick] (2,0) circle (1.5cm);
\end{tikzpicture}`

I would like to create a curved parallel naming arrow around this circle as shown in the image.

enter image description here

Please help

4
\begin{tikzpicture}
\draw[thick] (2,0) circle (1.5cm);
\draw[-latex] (0.2,0) arc (180:120:1.8cm) node[near start,left] {$n$};
\end{tikzpicture}

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