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 (10[1])epsilon-naught times chi times this quantity, which, when crossed with the H-field, equals the Poynting (10[2])vector. This quantity is the (-5[1])negative (10[1])gradient of the scalar (10[1])potential. The divergence of (10[1])this (-5[1])quantity (-5[1])equals (10[2])charge density (10[2])over (10[1])permittivity according to Gauss’s law. For 10 points, charge times what quantity gives the strength of the electrostatic force? (10[2]0[6])■END■