3. a dipole is an arrangement of equal but opposite charges separated by a dista
ID: 1917802 • Letter: 3
Question
3. a dipole is an arrangement of equal but opposite charges separated by a distance, such that the electric fields almost, but not quite, cancel out. A quadrupole takes this one step further. It can be thought of as an arrangement of two dipoles, so that their electric fields almost, but not quite cancel out. Suppose we had a quadrupole made of the four charges at right arranged around the origin.
a. Find a formula the net electric field as a function of r for a point along the x axis directly to the right of the quadrupole.
b. If |q| = 1.5 nC and a = 2
Explanation / Answer
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