PHY 112 Lab 3
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Rio Salado Community College *
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Course
112
Subject
Electrical Engineering
Date
Apr 3, 2024
Type
Pages
6
Uploaded by DoctorLemurPerson1037
Michaela Blackmore #14371 2/18/2024
Lab 3: Equipotential Mapping
Question:
The purpose of this lab is to observe the electric potentials between a positive and a
negative source at varying positions. This will be conducted by using a battery to create a
potential difference between two points that will then be measured using a voltmeter. Using 2D
and 3D graphs, the relationship between distance and potential differences will be observed.
Materials:
From lab kit:
●
9V battery
●
9V battery connector
●
2 insulated wires with alligator clips
●
Voltmeter
●
Styrofoam base
●
2 Nails
Student provided:
●
Flat-bottomed glass container
●
Permanent marker
●
Tape
●
Tap water
Procedures:
A grid was created by measuring 1cmx1cm spaces on a piece of styrofoam. This grid was then
labeled 1-8 and A-I. Two nails were then placed in spaces that were 6cm apart. The nails were
inserted so that the head of the nail was on the unlabelled side of the grid and the point of the nail
facing up out of the styrofoam. A mark was made directly in the middle of the two nails creating
a zero potential location. Insulated wire was then connected to the tops of each nail using an
alligator clip. The other end of the insulated wires were then connected to the leads on the 9V
battery connector. The battery was left unconnected while the voltmeter was set up and set to
20DCV. The battery was then connected. The black voltmeter lead was placed in the water at the
zero potential location, directly in the middle of the two nails. This lead remained at the same
location throughout the experiment ensuring it is in the water and not pushing in the styrofoam.
The red lead was then moved throughout the grid starting at the A1 grid space and measuring
until all spaces A1- I8 were measured and recorded. A 2D and 3D contour graph was then
created to visualize the location of the voltmeter to the electric potential generated.
Michaela Blackmore #14371 2/18/2024
Photos:
Data:
Table 1: Electric Potential Measured at Each Grid Space
Nails were placed at C4 and G4. Values were measured in voltages (V).
Michaela Blackmore #14371 2/18/2024
Calculations and Graphs:
Distance between nails= 6cm
Graph 1:
Graph 2:
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