Gostaria de desenhar isso para um de meus relatórios. Mas não sei como.
Responder1
Doo a você o anel carregado uniformemente usando Mathcha indicado anteriormente em meu comentário.
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% Text Node
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% Text Node
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% Text Node
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% Text Node
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\end{tikzpicture}
\caption{Ring uniformly charged.}
\end{figure}
\end{document}