Select the check box for "Voltage." Select the check box for "Values." Select the check box for "Grid." Drag and drop a single positive +1 nC charge in the center of the grid. Place a yellow E-Field sensor in several locations near, but not on top of, the point charge. Use this sensor to check three properties of the electric field of a point charge. 1. The field is directed radially outward from the charge. 2. The field has a magnitude that is constant for any given radius. 3. The field magnitude at radius r = 6 meters is 1/4 times the magnitude at 34 meters. While the first two given properties are general, the third property is a specific case of the 1/r* (read as "one over r squared") dependence of the electric field. In other words, the magnitude of the electric field of a point charge drops as the square of the radius. In this activity, you are going to use data to confirm this property. In your favorite spreadsheet program, plot the magnitude of the electric field _ keq, 1= at 0.5 m intervals. Here k. is the electrostatic constant and is equal to 8.99 x 10 N m2/C2, and as previously directed, g1 is +1 nC. If your spreadsheet program is capable of doing so, fit a power law curve to your calculated values. In Excel, you can access the dialog box shown below by right clicking on any data point and selecting "insert trendline." Figure 1. Options for inserting a trendline in Excel showing the 1) power law, 2) display equation options, and 3) the displayed equation Now within the simulation, take data at intervals other than 0.5 meters. The intervals other than 0.5 meters will ensure that you can distinguish between the data and calculated values. Display both sets of data on a single graph. Do your data points match the calculated curve? How well does your data support the 1/r* dependence of the electric field magnitude on the radius? When writing your lab report or posting in the Discussion, be sure to include: Your data, in table format The corresponding graphical display Your answers to the questions posed above. When writing a lab report, this should be part of your discussion section and possibly included in your conclusion section. 2. Report your experimental data results below, in table format. Be sure to label your data rows/columns and specify the units of measurement. (Expand this area as necessary) 3. Report the corresponding graphical display of your data below. Make sure your graph is clearly labelled, including the units of measurement. (Expand this area as necessary) 4. Answer the questions posed in the Part you were assigned. (In subsequent modules, when you are writing a lab report, the answers to posed questions should be part of your Discussion section, and possibly included in your Conclusion section)