Mapping electric field/equipotential lines, assignment help

Hi. Based on the results for this conducting paper I need a better understanding. It was conducted at 10.0V. As seen in the photo, Started from 9.0 and decrease in increments of 1.0V. R=8500. What is concluded from the lines. Need a better understanding go the basic concept and interpretatng the results from the conducting paper. Thank you!

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