Electric Fields for Three Point Charges

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Contributed by: S. M. Blinder (March 2011)
Open content licensed under CC BY-NC-SA



Snapshot 1: one of the charges can be reduced to zero to give the field of two point charges

Snapshot 2: the field of a charge-dipole interaction

Snapshot 3: the field of a linear quadrupole formed by the closely spaced sequence of charges +1, -2, +1

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