Question

The divergence of J is equal to the negative rate of change of this quantity's density by the electromagnetic continuity equation. Positive values of this quantity arose in objects possessing too much fluid according to a theory by Ben Franklin. Gauss’s Law states that the electric flux through a closed surface is proportional to the amount of this quantity (*) enclosed. This quantity's elementary type was measured by the (10[1])Millikan oil drop experiment. (10[2])Current is the rate of flow of this quantity, whichis measured in coulombs. For 10 points, name this quantity which is positive for a proton and negative for an electron. ■END■

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