PHY 2 Experiment Report - NEEDED IN 24 hours

PHY 2092 Distance Learning Experiment Guide 02 Electric Potential and Field Mapping

YouTube Video #1 This 7:56 video is another fun one that is packed with excellent visualization aids and a good, accurate narration.

https://www.youtube.com/watch?v=Y6YdC2UoDYY

Photographs

Examine all photographs in the alphabetical filename order given. Again, they can be found in Canvas > Files > Experiments > 02 Potential and Field. The experiment description found in the lab manual has been updated with color-coded diagrams for this term. It also includes an additional diagram for Part 3.

Videos

As with experiment 01, these videos are located in Canvas > Panopto Recordings > Exp 02 Potential and Field. Most of these files are very large. Therefore, streaming and watching them may be preferable to downloading. This situation is the result of external constraints placed on the timeline for recording the videos. Notify your GSA if the file size becomes a problem.

Unfortunately, an important video segment was not recorded during this aforementioned timeline. One must imagine the dual-pronged probe being twisted about a vertical axis while it is contact with the water. The digital multimeter’s (DMM) voltage reading will change rapidly. We use Melbourne city water for this experiment and its mineral content causes the voltage measured by the DMM to fluctuate. However, these fluctuations are small (a few 1/100ths of a Volt) compared to the effect of twisting the probe (several tenths of a volt). To assist with your answering the questions in Part 3, procedure 4: consider this additional question: When the prongs of this probe are parallel to a field line, the angle between � and � in Equation 5 will be either zero or 180 degrees. When is it zero and when is it 180 degrees?

�

Δ ! l!

E

0 1 2 3 4 5 6 7 8 9

0

1

2

3

4

5

6

7

8

9

The arrows represent the prongs of the dual-pronged probe. If the left probe is connected to the meterʼs positive terminal, then the meter will read a positive number because the electric potential at the left probe is higher than the potential at the right probe.

A graph of electric potential of charged point particle versus radial distance from that particle: V(r) = 1 / r. The particle sits at the origin. The y-axis is electric potential V and the x-axis is the radial coordinate, r.

Data

The data for all parts of this experiment are contained in one Excel spreadsheet. It is found in Canvas > Files > Experiments > 02 Potential and Field > Exp 02 Data.xlsx.

Unlike the previous experiment, there is a great deal of physics contained in this experiment. Students should pay special attention to the questions listed in the procedure.