First Hour Exam

The computer portion

9/25/97

Total points 50 points

Create a Worddocument with your first name and Exam1 as a file name,
e.g.BobExam1, to save your answers to all of the computer questions.
Save frequently to your User Folder and then submit your document to
phy212@unl.edu

First Computer Question:[15 points] EM Field

C1Start the EM Fieldapplication software. Set it up so that you can place 3D point charges constrained to a grid. If you place multiple charges at the same position, then the software will add up the total charge. For example, if you put two -8 charges on top of each other, then that would be a total charge of -16 at that position. Select two grid positions in the middle of the screen which are separated with one grid position in the middle. On one, place a large (between 35 and 50) positive charge and on the other place the identical amount of negative charge. You have now created an electric dipole. Using the EM Fieldsoftware, investigate the equipotentials and electric field vectors surrounding this electric dipole. How do these quantities vary with distance from the dipole? Write a report that describes your findings. Your descriptions should be both quantitative and/or qualitative. Your description should include no morethan two graphical images. Software hints: To take a picture of part of the screen to paste into your Worddocument, press at the same time: +shift+5