![]() ![]() You will plot equipotential lines on the provided template that mimic your experimental setup (Figure E.2).Īctivate the “Analog 7” probe and click “Record”. Your report should contain graph with your experimental and calculated results for, the graph with your experimental and theoretical estimates of, and your reflections on the results and accuracy of the proposed Model 1.įigure E.2 Plotting equipotential lines and electric field lines.Your experimental estimate may be noisy – it is ok. Plot your experimental and theoretical estimates of on the same graph.Create yet another column for theoretical values of (use the value for coefficient you found in Prelab for Model 1):.Create additional column in your spreadsheet for your estimate. (you may calculate electric field magnitude in Volts/cm). For each point approximate the derivative of the potential with a finite difference: Estimate the magnitude of the electric field from your experimental data.Do they match? If not, is the difference significant? What might be the reason for the discrepancy? Plot your calculated on the same graph as your experimental results. ![]() Add additional column in your spreadsheet with calculated values of for the same values of as your experimental data (use in your calculations). ![]() position and compare with your experimental results. ![]() Use Model 1 proposed for this experiment to calculate theoretical estimate for the potential vs.Create a plot of your experimental data for potential vs.You may choose the origin at the midpoint between the circles (in this case the position would range from to, with having potential of and at about ). Make appropriate table in Excel – potential vs. Measure the potential along the line connecting the circles at intervals. First, we will explore how the electric potential varies as a function of position on the conducting paper.You may click on the graph title “Analog 7”– this will collapse the graph and will conveniently show numerical value for the voltage measured by the probe.It should read about 1.65 V when it is not touching anything. Turn on your iOLab, activate the “Analog 7” probe and click “Record”.This wire will be your probe for the electric potential. Attach additional jumper wire to the “A7” terminal and connect it to the third alligator clip wire.The suggested connection setup of “3.3V” and “GND” terminals is not essential for the experimental results but we will refer to this setup in our calculations. This is the ground terminal, meaning it has a potential of 0 Volts. Attach jumper wire connected to the “lower” circle to the “GND” terminal of the iOLab device.This disk will be at a (higher) potential of 3.3V. Attach jumper wire connected to the “upper” circle to the “3.3V” terminal of your iOLab device.Connect other ends of alligator clip wires to long jumper wires. Attach alligator clip wires to the aluminum pushpins.Make sure the pushpins’ heads have good contact with the conducting circles on the paper. Attach black paper to the cork board with aluminum pushpins through the conducting circles.In our first experiment we will use the sheet that has two circles of radii 1cm with the centers at and (see Figure E.1). Figure E.1 You have sheets of slightly conducting black paper with points in a lattice each separated by 1 cm. ![]()
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