如何在物理实验室中绘制电流表？

Question

我需要帮助绘制如图所示的物理装置。

Answer 1

\documentclass[tikz,border=3.14mm]{standalone}
\begin{document}
\begin{tikzpicture}[font=\sffamily]
 \draw (120:4) arc(120:60:4);
 \foreach \X [count=\Y starting from 0,evaluate=\Y as \Z using {int(\Y/2)}] in {120,114,...,60}
 {\ifodd\Y
   \draw[rotate=\X] (4,0) -- (4.2,0);
  \else
  \draw[rotate=\X] (3.8,0) -- (4.3,0) node[pos=1.5,rotate=\X-90]{\Y}
  node[pos=-0.5,rotate=\X-90]{\Z}; 
 \fi}
 \draw[fill,thick] (0,0) circle (1pt) -- (74:4.4);
\end{tikzpicture}
\end{document}