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@jemoka / Jemoka Knowledge Base / raw/concept/kbhfaraday_s_law.md
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--- title: "faraday's law" source: https://www.jemoka.com/posts/kbhfaraday_s_law/ --- We have that: The change in volts in a relationship to the magnetic flux. \begin{equation} \epsilon = \oint \vec{E} \cdot \dd{\vec{l}} = - \dv{\Phi_{b}}{t} \end{equation} where, \(\Phi_{b}\) is the magnetic flux, namely how much magnetic field is through a surface: \begin{equation} \Phi_{b} = \int \vec{B} \cdot \dd{\vec{A}} \end{equation} usually, this is just \(BA\). Note! This tells us that the EMF (electric field per length) is just negative the change of magnetic flux.