This lab report summarizes an experiment to map electric field lines and equipotentials. Students set up an apparatus with a power supply, resistive paper, pins and alligator clips. They measured voltages at various points on the paper to find equipotentials and calculated the electric field from the voltage differences and distances. Their results showed symmetrical equipotential graphs and electric field lines perpendicular to equipotentials as expected. Calculated electric fields were in the expected range but some error was introduced by equipment limitations and measurement inaccuracies.