mdcours/src/phys/elec/chap1.md

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# Les Forces Electriques
\\[ |F| = k\frac{|Qq|}{r^2}\\]
\\[ k = \frac{1}{4\pi\varepsilon _0} = 9*10^9\\]
\\[ \varepsilon = 8,85 * 10^{-12} C^2/(Nm)^2\\]