This quantity is proportional to the time derivative of the superconducting current density in the first London equation. In the Faraday tensor, terms in the 0th row and column equal components of this quantity over (15[1])the speed of light. This quantity’s tangential component is continuous across an (15[1])interface. According to the (-5[1])macroscopic version of Ohm’s law, this quantity times (15[1])conductivity equals current density. (*) Polarization (10[1])density equals epsilon-naught times chi times this quantity, which, when crossed with the H-field, equals the Poynting vector. This quantity is the negative gradient of the scalar (10[1])potential. The divergence of this quantity equals charge density over permittivity according to Gauss’s law. For 10 points, charge times what quantity gives the strength of the electrostatic force? (10[1])■END■