ndangom-lab08

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Central Piedmont Community College *

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110A

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Electrical Engineering

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Dec 6, 2023

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docx

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Name: Micah Ndango Date: November 16, 2023 Lab 08 – Resistance in a Wire Part 1: Explore the simulation. Parameter Minimum Value Maximum Value Resistivity 0.01 1.00 Length 0.10 20.00 Area 0.01 15.00 Part 2: Effect of resistivity. Table 1 Resistivity ( Ω cm) Length (cm) Area (cm 2 ) Resistance ( Ω ) 0.10 10.00 7.50 0.133 0.20 10.00 7.50 0.267 0.30 10.00 7.50 0.400 0.40 10.00 7.50 0.533 0.50 10.00 7.50 0.667 0.60 10.00 7.50 0.800 0.70 10.00 7.50 0.933 0.80 10.00 7.50 1.07 0.90 10.00 7.50 1.20 Question 1 : Did the resistance go up or down as you increased the resistivity? Was the change linear or exponential? What were the highest and lowest resistance values obtained? Answer: The resistance increased as I increased the resistivity. The rate of change was linear. The highest resistance value was 1.20 ohms, and the lowest resistance value was 0.133 ohms.

Part 3. Effect of length. Table 2 Resistivity ( Ω cm) Length (cm) Area (cm 2 ) Resistance ( Ω ) 0.50 2.00 7.50 0.133 0.50 4.00 7.50 0.267 0.50 6.00 7.50 0.400 0.50 8.00 7.50 0.533 0.50 10.00 7.50 0.667 0.50 12.00 7.50 0.800 0.50 14.00 7.50 0.933 0.50 16.00 7.50 1.07 0.50 18.00 7.50 1.20 Question 2 : Did the resistance go up or down as you increased the length? Was the change linear or exponential? What were the highest and lowest resistance values obtained? Answer: The resistance increased as the length increased. The rate of change was linear. The highest resistance value was 1.20 ohms and the lowest resistance value was 0.133 ohms.

Part 4. Effect of cross-sectional area. Table 3 Resistivity ( Ω cm) Length (cm) Area (cm 2 ) Resistance ( Ω ) 0.50 10.00 1.50 3.33 0.50 10.00 3.00 1.67 0.50 10.00 4.50 1.11 0.50 10.00 6.00 0.833 0.50 10.00 7.50 0.667 0.50 10.00 9.00 0.556 0.50 10.00 10.50 0.467 0.50 10.00 12.00 0.417 0.50 10.00 13.50 0.370 Question 3 : Did the resistance go up or down as you increased the area? Was the change linear or exponential? What were the highest and lowest values resistance values obtained? Answer: The resistance decreased as the area increased. The rate of change was exponential. The highest resistance value is 3.33 ohms and the lowest resistance value is 0.370 ohms. Part 5. Circuit design. Table 4 Resistivity ( Ω cm) Length (cm) Area (cm 2 ) Resistance ( Ω ) 0.50 19.70 2.46 4.00 0.50 20.00 2.50 4.00 Summary question : What are three ways you could change these parameters to decrease the resistance in a wire? Answer: To decrease the resistance in a wire you can decrease the length, increase the area, or you can decrease the resistivity.

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