5CL Lab 5 Assignment Template - S23v2

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School

University of California, Los Angeles *

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Course

5C

Subject

Electrical Engineering

Date

Feb 20, 2024

Type

pdf

Pages

5

Uploaded by aed.academics

Activity 1 - Standard Resistor: Insert a picture of the resistance measurement you took with the multimeter (showing both the resistor and the resistance value on the multimeter). Insert a picture of the circuit you used to measure the voltage and current on your resistor. Include the two multimeters simultaneously measuring voltage and current in this picture. 2
A ctivity 1 - Standard Resistor: Plot your 6 Current (y-axis) vs. Voltage (x-axis) data points. Calculate resistance for each of these 6 points and plot Resistance vs. Voltage. Does the resistance depend on voltage? Based on your answer, is this resistor Ohmic or non-Ohmic? Calculate your resistance from this data (see lab manual) and compare to the direct resistance measurement. Are the two measurements the same? Do they agree with the nominal 100Ω rating of the resistor? According to Ohm’s law resistance does depend on voltage as the equation I=V/R converted to solve for resistance is R=V/I. Thus demonstrating R does depend on the voltage. The resistor is Ohmic as we can see a linear relationship in the current vs voltage graph. The final resistance measurement is 10.013/ 0.099=101.14. The two value are different as our direct resistance measurement was 99 Ω. They both do not agree with the nominal 100Ω rating of the resistor as our direct measurement was below and our calculated measurement was above the 100Ω rating of the resistor. 3 Voltage Current Resistance 0.013 0.001 13 0.94 0.009 104.44 1.43 0.014 102.14 1.92 0.019 101.05 2.42 0.023 105.22 3.29 0.033 99.64
Activity 2 - Light Bulb: Plot Current vs Voltage for your 10 data points. Calculate resistance for each measurement and plot Resistance vs. Voltage. Is the light bulb Ohmic? Explain your answer. It is not Ohmic because there is a nonlinear relationship between Current and Voltage seen in our first plot. 4 Voltage Current Resistance 0.010 0.005 2 0.183 0.066 2.772727273 0.415 .196 2.117346939 0.992 .271 3.660516605 1.450 .327 4.434250765 1.609 .346 4.650289017 1.988 .386 5.150259067 2.383 .427 5.580796253 2.887 .473 6.10359408 3.105 .509 6.100196464
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