Lab 1 DC POER & OHM'S LAB (3)
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Stony Brook University *
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123
Subject
Electrical Engineering
Date
Dec 6, 2023
Type
Pages
2
Uploaded by PresidentPolarBearMaster532
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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