• Adjusting the legend as before, you should obtain a graph like that shown below. Print it out.
• The circles represent positions that all have the same electric potential and hence are called equipotential sufaces.
• The inner most circle has an electric potential of 10 volts, the next 9 volts, and so on, down to 2 volts.
• The inner circle is deformed because our grid of (x,y) points is not very fine.

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