# Nt1310 Unit 4 Lab Report

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University of North Carolina at Charlotte
Department of Electrical and Computer Engineering

Laboratory Experimentation Report

Name: Langston Tucker Date: September 28, 2014

Course Number: ECGR 2155 Section: L05

Experiment Titles: Experiment Number: 2, 3, & 4
Lab 2: Basic Circuit Elements
Lab 3: DC Voltage and Current Sources
Lab 4: Series Circuit Characteristics

Lab Partners: James Henderson and Joshua Sayles

Equipment List:

Objective: Experiment 2
The purpose of this lab was to familiarize ourselves with basic circuit elements. Those being, resistors, capacitors, inductors. Furthermore using basic calculations we determined the dissipated power in our elements. Experiment 3
The purpose of this …show more content…
Source voltage = 18V
VR1+…+VR6 = 1.72 V + 2.10 V + 4.51 V + 3.19 V + 1.14 V + 5.34 V = 18V

Similarly to the VCD + VDE = VCE example, we can add partial circuits to find the voltage drop over part of a circuit. We would expect:

VAB + VBC = VAC = 3.82 V
VCB + VBA = VCA = -3.82 V
VDE + VEF + VFG = VDG = 9.67 V
VED + VDC + VCB + VBA = VEA = 11.52 V
VBC + VCD + VDE + VEF = VBF = 10.94
VCD + VDE + VEF + VFG = VCG = 14.18

By connecting the voltmeter across the following connections as seen at the figure on the right, we can measure the voltage drop at each resistor.

VAB=VR1= 2.750 V
VBC=VR2= 2.239 V
VCD=VR3= 5.884 V
VDE=VR4=4.105 V

Connecting one end of the multimeter to ground and the other to the nodes A, B, C, D, and E, we obtain voltages:

VA = 14.84 V
VB = 12.17 V
VC = 9.97 V
VD = 4.11 V
VE = 0

We expect to see zero at point E because it is the ground.

For each of the following figures the voltage has been determined by using the multimeter.

Grounded at point D Grounded at point C

VA = 10.77 V VA = 5.013 V
VB = 7.97 V VB = 2.341 V
VC = 5.91 V VC = 0 V
VD = 0 V VD = -5.924 V
VE = -4.22 V VE = -1.052 …show more content…
Ohm’s law was key to successfully completing this experiment because voltage, current, and resistance provide the foundation in which all electrical devices are built upon. Percent error should also be taken into account because various physical traits come into play that could disturb the nominal value of the resistances. For example, the more current forced through a resistor, the more the electrons vibrate, generating heat thus making it more difficult for additional electrons to pass through, increasing the resistance in the wire. This phenomenon was observed when we burned out our 470 Ω resistor. Experiment 3
In this experiment we observed the model of a constant voltage and current supply. With the help of our variable resistor, the linear relationship provided to us by Ohm’s law was generated. Experiment 4
In this experiment we observed the behavior of a series circuit with a load and resistors. Basic electronics principals came into play here like RT = R1+ R2 +R3+… and Ia = Ib = Ic = Id = Ie = If = Ig … Ohm’s law was also key in this experiment as it helped define the voltage divider which can only be used in series circuits and helps us determine voltages at specific locations.
List of Attachments:
POST-LAB QUESTIONS Experiment

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