The Electric Dipole

• Now let us produce similar graphs (both types) for the electric potential for the case with two particles, one having the original charge, the other having the opposite charge. The first one is positioned 3.1 cm to the left of the origin and the other 3.1 cm right of the origin.
• (We have to move our charges off the grid for technical reasons.)
• The formula one enters in cell B2 is then
  =0.2/SQRT((B$1-0.031)^2+$A2^2)-0.2/SQRT((B$1+0.031)^2+$A2^2)

• Where is the potential zero in your plot?

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