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
VOCABULARY SET 2 Executor/Administrator: representative of a succession, executor appointed under a will, administrator appointed by court (male) Executrix/Administratrix: representative of a succession, executor appointed under a will, administrator appointed by court (female) Intestate: dying without a will Testate: dying with a will Olographic Will: wholly handwritten by the testator Probate: legal proceeding recognizing a will Legatee: heir under a will Separate Property: property owned before marriage or with separate funds Community Property: property acquired during marriage Testament: person’s last wishes Testator: person for whom a will is prepared (male) Testatrix: person for whom a will is prepared (female) Deceased: person who has died Estate: property