Version One – Homework 1 – Juyang Huang – 24018 – Jan 16 ...

Version One – Homework 1 – Juyang Huang – 24018 – Jan 16, 2008 34
Gauss’ law states
∮
Φ S =
⃗E · d ⃗ A = Q ɛ 0
.
Solutions: The electric dipole consists of
two equal and opposite charges separated by
a distance. In either situation (c) or (d), the
electric field is uniform and parallel everywhere.
Thus, the electric force on one charge
is equal but opposite to that on another so
that the net force on the whole dipole is zero.
By contrast, electric fields are nonuniform for
situations both (a) and (b).
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