Figure 2.35 summarizes the laws of electrostatics in a “triangle diagram” relating the source (ρ), the field (E), and the potential (V). Figure 5.48 does the same for magnetostatics, where the source is J, the field is B, and the potential is A. Construct the analogous diagram for electrodynamics, with sources ρ and J (constrained by the continuity equation), fields E and B, and potentials V and A (constrained by the Lorenz gauge condition). Do not include formulas for V and A in terms of E and B.

Figure 5.48

Figure 2.35

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We are required to draw a diagram for electrodynamics that is analogous to the given diagrams for electrostatics and magnetostatics.