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Step 3. Clear the space again, then place one positive charge and one negative charge in the space. Use the equipotential box to construct an equipotential field map. Make sure you find the equipotential line that is equidistant from each charge. Draw this map In your lab notebook. Step 4. Clear the space again. Prior to putting two negative charges in the space, draw a predicted equipotential map in your lab notebook. Once complete, construct the map on the virtual space. Compare your drawing to the simulation's map. Repeat part 4 with a more complicated arrangement of charges