1202_LabManual.pdf

# 96 electric field vectors 1202lab4prob1 click the

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ELECTRIC FIELD VECTORS – 1202Lab4Prob1 Click the Electric Field line button on the toolbar and move the cursor within the workspace to where you would like to evaluate a field vector. An electric field vector will appear with direction given by the arrowhead and the relative magnitude given by the length. Position and values for potential and field will be displayed on the bottom of the workspace. Clicking the mouse replaces the vector with an infinite field line, and moving the cursor will display new position, potential and field values for the new location. Repeat this procedure over consistent intervals (i.e. a grid) in the horizontal and vertical directions until you have created a reasonable table of data for the electric field. Discuss in your group and note in your notebook: What are the differences and similarities between the "field lines" and "field vectors" representations of the electric field? Are they equally useful? Why or why not? Repeat the above exercise for the electric field of a negatively charged point object. Save your result to a table. Discuss in your group and note in your notebook: How does the vector field compare to that for the positive point charge? What effect does increasing the change value have on the vector field map? Finally, create a dipole by dragging two equal but opposite point charges into the workspace. Make sure to take the position data for both point charges. Try a different spacing between the two charged objects in the dipole to see how that changes the electric field map. Try larger charges. If you are very far away from the dipole, how does the field compare to that due to a single charged point object? How about when you are very close to one of the charged objects in the dipole? 97