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@jemoka / Jemoka Knowledge Base / wiki/concepts/permittivity_of_free_space.md
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--- title: "permittivity of free space" type: concept related: [Coulomb S Law, Permittivity Of Free Space] source: https://www.jemoka.com/posts/kbhpermittivity_of_free_space/ confidence: high status: active --- permittivity of free space is a constant \(\epsilon_{0} \approx 8.85 \times 10^{-12} \frac{C^{2}}{N \cdot m^{2}}\). redefinition of Coulomb’s Constant based on permittivity of free space \begin{equation} k = \frac{1}{4\pi \epsilon_{0}} \end{equation}