Lab 1 DC POER & OHM'S LAB (3)

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Stony Brook University *

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Electrical Engineering

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Dec 6, 2023

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Hannah Mathew ID: 115441475
Hannah Mathew ID: 115441475 A. Use the two lowest voltage data points to compute the differential resistance at low voltage. 0.5V-5V/ 0A-0A= 0 Ω B. Use the two highest voltage points to compute the differential resistance at a higher voltage. 0.3077V-2.975V/15A-10A= 0.0204 Ω 1. What was the measured conductance of the resistor? Don’t forget units. (2 points) The measured conductance of the resistor is 0.819 Ω. 2. What was the corresponding resistance? (2 points) The corresponding resistance is 4.66 Ω. 3. The resistor has a nominal value of 1 ohm. What was the percent deviation between the measured and nominal values? Use this formula to compute percent error: (1 point) Percent error: 0.819 Ω - 1 Ω/ 1 Ω = -0.181% 4. The resistor has a resistance tolerance of ±5%, so you would expect your measured resistance to be between 0.95 and 1.05 ohms. Was your resistor in that range? What sources might have contributed to measurement error? (3 points) My resistor was not in that range, our resistor was 0.819 Ω. There could have been many sources of error such as, rounding incorrectly or recording the data wrong. 5. What value did you get when you calculated the resistance for the LED using the whole data set? Is this device well described by Ohm’s Law? (3 points) The value I got when calculating the resistance for the LED using the whole data set was 4.66 Ω. This device is described well by Ohm’s Law because the voltage was directly proportional to the current flowing through it. 6. What was the differential resistance for the LED at high current? (2 points) 0.0204 Ω 7. What was the differential resistance for the LED at low current. (2 points) 0 Ω
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