Electric potential energy q|Charge q [C]|Charge q|-1.602176634E-19 Q0|Charge Q0 [C]|Charge Q0|4.6463122386E-18 r|r [m]|Distance|136.13E-12 ep0|ep0 [N*(m^2)/(C^2)]|Vacuum electric permittivity|8.8541878128E-12 U|U [J]|Electric potential energy U(r) with U(infinity)=0|q*Q0/(4*Pi*ep0*r) 2020-10-24