Assignment1LabReportEE

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Gordon College *

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Electrical Engineering

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Apr 3, 2024

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1 Proving Ohm’s Law Javon Barron 9-23-2022 Kennesaw State University EE 1000

2 Table of Contents: Title page………..1 Table of Contents……………2 Introduction………………… ........... 3 Procedure……………………….4 a. Tools for D.C. experiment……………….4 b. Schematic for D.C. experiment………….5 c. Steps for D.C. experiment……….6 Results…………………………….7 Analysis…………………………..8 Conclusion…………………………..9 Bibliography…………………...10 Appendix…………………11

3 Introduction: In this lab we are going to prove the concept of Ohm’s law. We are going to prove ohms law by experimenting with a constructed circuit that has, a 33 ohm and ½ W resistor, a voltmeter, a thermometer, banana clip wires, and a power a supply. In this experiment the voltage in the resistors is going to increases, and as the voltage increases the resistor will stop functioning and the circuit will start providing errors Which is to fail within the 5% of the claimed resistance. In proving ohms law to record the resistance we are going to be using (V=IR) and to find the power we are going to be using the equation (P=IV).

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4 Procedure: (4a) Tools for Experiment  33-ohm ½ w resistor  Voltmeter  Temperature Probe  Banana clip wires  Power supply (4b) Schematic for Experiment Multimeter

5 (4c) Steps for D.C. Experiment Black wire Red wire Power supply Red wire ½ Watt 33Ohm +/ 5% Resistor R1 Multimeter Black wire Black wire

6 1. Gather all tools listed in the experiment 2. Make sure power supply is turned off 3. Connect red wire to the (+) on the power supply 4. Connect other end of red wire to multimeter 5. Turn multimeter on and dial until it can read amps. 6. Connect black wire to another end of multimeter 7. The other end will connect to the top of the resistor 8. Connect another black wire to the opposite end of the resistor and place it into the opposite end of the power supply (-). 9. (Part 2) Attach the second multimeter in the circuit by using a parallel circuit. 10. Connect an additional red wire to the end of the resistor then connect the other end to the second multimeter 11. Connect an additional black wire to the opposite end of the resistor then connect the other end the second multimeter 12. Have your observational chart ready to record the data 13. Turn the power supply on, increasing the volts by 1.5 for each observation 14. Take your data to find resistance by dividing your voltage by the current. 15. Take your data to find power by adding the voltage and the current. Results:

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7  These are the results from the experiment needed to prove Ohms Law. Volts(V) Current(mA) Resistance(Ohms) Temp© Power(w) Observation 0 0 0 74.3 0 Good 1.49 .45 3.31111 75.6 .6795 Good 3 .9 3.33333 75.7 2.718 Good 4.51 1.35 3.34074 76.1 6.0885 Good 6.08 1.8 3.37777 77.6 10.944 Burning 7.44 2.25 3.30666 79 16.74 Okay 8.91 2.7 3.3 80.2 24.057 Okay 10.48 3.19 3.28526 81.4 33.4312 Okay 12 3.68 3.26086 83.6 44.16 Okay 13.5 4.17 3.23741 85.1 56.295 dead Analysis:

8 In the experiment with the resistor, Ohms Law (V=IR) was conducted by increasing the voltage. Increasing the voltage up 1.5v each time. The circuit was running great up until we pushed the voltage to 6.08v. It slowly started to have a burning smell. After continuously increasing the voltage, the circuit finally gave out and died. The circuit stopped working at 13.5 volts. The resistance started to go down after we pushed 6.08v. The power equation (P=IV) is used to find the power in the resistor.  Graph Of D.C. Lab Results 1.5 3 4.5 6 7.5 9 10.5 12 13.5 15 0 10 20 30 40 50 60 70 80 90 0.45 0.9 1.35 1.8 2.25 2.7 3.19 3.68 4.17 3.31 3.33 3.34 3.38 3.31 3.3 3.29 3.26 3.24 75.6 75.7 76.1 77.6 79 80.2 81.4 83.6 85.1 0.68 2.72 6.09 10.94 16.74 24.06 33.43 44.16 56.3 Current Resistance Temp Power Conclusion:

9 In conclusion, after gathering all the equipment needed for the experiment and constructing the circuit. We can say the experiment was a success. Using the tools, we were given shows that we can prove ohms law. The date given to us by the tools is like the theoretical data you can get by using the formulars for ohms law and power. The is a slight error with the experimental data and the theoretical data because of the equipment being older. If there was a chance to get more up to date equipment, I would have done the lab experiment the same way, it would just have given more accurate answers. Giving us a smaller percentage of errors. References:

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10 Work cited [1] “EE multimeter - Bing video,” www.bing.com . https://www.bing.com/videos/search? q=EE+multimeter&&view=detail&mid=7778391F5FAFA57F2BE57778391F5FAFA57F2BE5 &&FORM=VRDGAR&ru=%2Fvideos%2Fsearch%3Fq%3DEE%2Bmultimeter%26FORM %3DHDRSC4 (accessed Dec. 07, 2022). [2] L. Pulic, “How To Use a Multimeter - The Beginner’s Guide,” Build Electronic Circuits , Dec. 13, 2021. https://www.build-electronic-circuits.com/how-to-use-a-multimeter/#:~:text=Turn %20the%20dial%20to%20the%20A%20%28current%29%20section (accessed Dec. 07, 2022). Appendix: