{"type":"rich","version":"1.0","title":"electric field of point charge (vector notation)","html":"<span class=\"wb-embed wb-embed-math\" data-latex=\"\\vec E_{A \\to B} = \\frac{1}{4\\pi\\epsilon_0}\\frac{Q_A}{\\left\\| AB \\right\\|^2}\\widehat{AB}\">\\vec E_{A \\to B} = \\frac{1}{4\\pi\\epsilon_0}\\frac{Q_A}{\\left\\| AB \\right\\|^2}\\widehat{AB}</span><div class=\"wb-embed-note\"><p>Where $A$ is a point charge and $B$ is arbitrary point in space\n</p></div><footer><cite class=\"wb-embed-author\">Rong Martin-Siebler ZHOU</cite></footer>","width":640,"height":320}