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@jemoka / Jemoka Knowledge Base / wiki/concepts/current.md
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--- title: "current" type: concept related: [Charged, Current] source: https://www.jemoka.com/posts/kbhcurrent/ confidence: high status: active --- current is defined as the flow of positive charge. Specifically: \begin{equation} I = \frac{\Delta Q}{\Delta t} \end{equation} resistance of a wire (if ever you come across needing to calculate the resistance of the wire from scratch) \begin{equation} R = \rho \frac{L}{A} \end{equation} where, \(\rho\) is the material resistivity, \(L\) the length, and \(A\) the cross-sectional area. you rarely need to do this!