Suppose J(r) is constant in time, so (Prob. 7.60) ?(r, t)
Chapter 10, Problem 13P(choose chapter or problem)
Problem 13P
Suppose J(r) is constant in time, so (Prob. 7.60) ρ(r, t) = ρ(r, 0) + ρ? (r, 0)t. Show that
that is, Coulomb’s law holds, with the charge density evaluated at the non-retarded time.
Reference Prob. 7.60
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