Ohm's Law Report

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School

University of Mississippi *

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Course

222

Subject

Electrical Engineering

Date

Apr 3, 2024

Type

docx

Pages

3

Uploaded by EarlSnow13883

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Ohm’s Law February 21st, 2024 Introduction The objective of this lab is to learn the relationship between resistance, current, and voltage. Otherwise, this relationship is called Ohm’s Law. We will do this by using different colored coded resistors wired to two DMMs with leads. Additionally, we used a light bulb to further plot the resistor versus bulb relationship. Data Plots/Charts Plot 1 Voltage vs. Various Resistors Plot 2 Voltage vs. Current of Light Bulb
Table 1 R(DMM) R (code) % Difference R (plot) % Difference 153 ohm 150 ohm 2% .151 ohm 1.32% 357 ohm 330 ohm 8.18% .355 ohm .56% 563 ohm 520 ohm 8.27% .556 ohm 1.26% Results For the 150 Ohm resistor, the slope was .151. The percent difference between that slope and the reading of the DMM was 1.32%. For the 330 Ohm resistor, the slope was .355. This was .56% different from the original reading. For the 520 Ohm resistor, the slope was .556. This was 2.26% different from the DMM reading. Discussion of Results We have learned that voltage is proportional to resistance times current. Therefore, when we plot voltage versus resistance, we are finding the current through the given circuit. Therefore, the current is constant because the voltage and resistance are changing. That is why we get a linearly proportional relationship. Some potential errors that we may have encountered was the
preciseness of the equipment. The DMM may have not been giving the most accurate readings of the currents going through the wires. Post Lab Questions Please see attached. Raw Data/Sample Calculations Please see attached.
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