ohms law
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School
Florida Agricultural and Mechanical University *
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Course
2048L
Subject
Electrical Engineering
Date
Apr 3, 2024
Type
docx
Pages
4
Uploaded by ProfMusicEmu4
Ohm's Law
Written by: Sevaughn Clarington
Partners:
Jeniya Strobridge
Jayme Colbert-Williams
Due: February 19th, 2024
Abstract: This experiment served to calculate the Ohms by measuring the value of voltage and amperes throughout eight trials. The ohms were calculated using two equations.The first equation was voltage divided by amperes, and the second equation was the rise over run for the slope. The first
equation resulted in R= 2.7175, and the second equation resulted in R= 2.66.
Introduction:
In this lab, we're exploring the basic principles of electrical resistance discovered by Ohm. Ohm found that when voltage changes across a resistor, the current through it changes, too. Ohm's groundbreaking discovery revealed that in a resistor, the current (I) flowing through it is directly proportional to the voltage (V) applied across it, while inversely proportional to the resistance (R), expressed mathematically as I = V/R. By conducting experiments with different resistors, we will investigate the relationship between current and voltage in Ohmic and non-Ohmic materials.
Theory: In this experiment, the constant resistance (Ohms) was calculated by measuring the voltage and amperes throughout eight trials. Ohms was and calculated by this equation: (1) R= V/A. This equation translates to: Ohms is equal to voltage divided by amperes. The equation to find Ohms from slope is:
(2) R= y/x. This translates to Ohms is equal to voltage 1 minus voltage 2, divided by ampere
1 minus ampere 2.
Procedure: Using the diagram of the circuits, the assembly was made. The rheostat was adjusted
to get the current on the voltameter at a minimum and the voltage and current. The rheostat was then adjusted to 50 mA and the voltage along with the current was recorded. Step three was then repeated for a total of eight times to get eight readings. The power supply was then turned off and the circuit disassembled. R x
= V/I was then calculated for each trial (with error estimate) to find the average value of R x for all the trials. With the data gathered from the last step V vs. I was plotted and R x (with an error estimate) was found from the slope of the graph.
Results: Trial#
Current Voltage
R
1
0.1
0.15
1.5
2
0.1
0.3
3
3
0.2
0.5
2.5
4
0.25
0.7
2.8
5
0.3
0.9
3
6
0.35
1.1
3.14
7
0.4
1.2
3
8
0.5
1.4
2.8
Average R= 2.7175 Slope: y=3.1161x-0.0757
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Discussion:
As a result, we calculated 2.7175 as the average Ohms after eight trials. The result of the Ohms calculated through slope was 3.1161x-0.0757. These results are close, with small uncertainty. There is a possibility of a systematic error, such as misreading either the voltage or ampere measurement. However, it would not affect the results drastically. Conclusion:
In summary, this lab improved our comprehension of the fundamental differences between ohmic and non-ohmic materials as well as the connections between current, resistance, and voltage. We were able to obtain varied voltages and currents, observe our findings, and create graphs by applying a potential difference.
Questions : 1.
Compare the resistance, R
x , found as an average value to the R
x
from the slope of the graph.
-
The resistance, R
x was 2.7175 and the average value to the R
x
from the slope of the graph was 3.1161x-0.0757.
2.
Does the resistor have a constant resistance? Why or why not?
-
Since the average and slope aren’t equal, the resistor didn’t have a constant resistance.
Related Questions
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3.Question
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QUESTION 7
Match Collumn A and Collumn B? Properties of Metal
v Britleness
A. the property of a metal which allows little bending or deformation without shattering
Conductivity
B. the property of metal to resist deformation and stress without breaking
the property of a metal which can be hammered, rolled. or pressed into various shape without
C.
v Hardness
cracking, breaking or leaving some other detrimental effect
v Strength
D. the property of a metal to resist cutting, penetration and abbrasion
v Elasticity
E. the weight of a unit volume of a material
F. the property of a metal to become liquid by the application of heat
v Malleability
the property of metal which enables a material to return to its original state when the force
G.
applied is removed
v Fusibility
v Density
H. the property of a metal to conduct electricity or heat
Click Save and Submit to save and submit. Click Save All Answers to save all answers.
Beno
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I need helpo with this. I need step by step solutions for this and I cant figure it out.
Wire to be used in buildings and homes in the United States is standardized according to the AWGsystem (American Wire Gauge). Wires are assigned a gauge number according to their diameter.The scale ranges from gauge 0000 to gauge 36 in 39 steps. The equation for the wire gauge interms of the wire diameter in millimeters is the picture.
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3. Fast help needed to answer this Engineeing question. Check image.
Postive feedback for right answer :)
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Consider the circuit shown in Figure P1.68. a. Which elements are in series?b. Which elements are in parallel? c. Apply Ohm’s and Kirchhoff’s laws to solve for R x.
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Recommended textbooks for you
- Delmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage Learning
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Cengage Learning