Lab Report#1 Measurements in resistive networks and circuit laws laboratory Abstract:
The purpose of this lab is to verify the Ohm's Law, Kirchhoff's Voltage and Current Laws. As well as the introduction to the voltage division. The Ohm's Law states that the current through a conductor between two points is directly proportional to the potential difference across the two points (V = IR). The Kirchhoff's Voltage Law states that the directed sum of the electrical voltage around any closed network is zero. The Kirchhoff's Current Law states that the algebraic sum of currents in a network of conductors meeting at a point is zero. This lab report presents the lab results of 4 different parts of the lab and they provide experimented data, both numerical and visual, that verifies the Ohm's Law, Kirchhoff's Voltage and Current Laws.

Lee 2

Data:
Ohm's Law (part I)

Figure 1.1 Table 1.1 Vs -10V -5V 0V 5V 10V I -3.16mA -1.58mA 0.09mA 1.58mA 3.16mA V -6.86V -3.42V 0.19V 3.42V 6.86V

Current vs. Voltage
10 y = 2.169x - 0.001 voltage (V) 5 0 -2 -5 -10 current (mA) 0 2 4

-4

Graph 1.1 -The plot on the does not go through the origin, but it should. Ideally, when the voltage source is equal to 0V, both the voltage and the current should be 0V and 0mA respectively which will make the plot go through the origin; however, because of the resistance from the voltmeter, the actual readings of voltage and the current when measured are a bit off from 0V(0.19V) and 0mA(0.09mA). -Unknown resistance (actual given value is equal to 2.2 kΩ) is the slope of the linear line of the graph, R ≈ 2.169kΩ

Lee 3

Ohm's Law (part II)

R = 2.2kΩ Figure 1.2 Table 1.2 Vs I -10V -4.73mA -5V -3.15mA 0V -1.48mA 5V -0.01mA 10V 1.58mA

V -5.30V -1.86V 1.72V 4.98V 8.41V

Current vs. Voltage
voltage (V) 10 y = 2.197x + 5.188 5 0 -5 -4 -3 -2 -1 -5 -10 0 1 2

-6

current (mA)

Graph 1.2 Compare: The resistances that can be derived from the Graph 1.1...

...Kirchhoff. Kirchhoff’s first law is his voltage law. Kirchhoff’s Voltage Law (KVL) states that around any loop in a circuit, the voltage rises must equal the voltage drops. The next law that Kirchhoff introduced was his current law. Kirchhoff’s Current Law (KCL) states that the total current entering a junction must equal the total current leaving the junction. These laws, however, cannot be proven or tested without the aid of a multimeter. A multimeter is an instrument designed to measure electric current, voltage, and usually resistance, typically over several ranges of value. The multimeter has different programs to measure voltage, current, resistance, etc. produced from one of two types of circuits. The first type of circuit is a series circuit. A series circuit is a circuit in which the components are arranged end to end in such a way that the electric current flows through the first component, through the next component, and so on, until it reaches the source again. In contrast, a parallel circuit is a circuit in which the has more than one resistor and has multiple paths to move along. The main purpose of this lab was to prove the laws of Ohm and Kirchhoff. On another note, being able to take part in this lab taught my partner and I the fundamental skills of constructing series and parallel circuit and using a...

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Lab 3. Dc circuits and Ohm’s law of measurments
Helina Wolfe
Tannaz Farnoudi and Najah Rouse
Physics 246-205
Professor Joe Renaud
09/23/13
Word count:1453
Abstract:
The aim of this experiment was to understand the relationship between the variables of Ohm’s law and how they are part of an operation of an electric circuit.
Introduction:
This experiment was done in two parts. The first part consisted of understanding how to determine the current, voltage and resistance as part of Ohm’s law. The second part consisted of how to use the variables in an electrical current. Knowing how the variables are used in calculations and electrical currents is important in determining the value of the resistor and how it affects the current in the circuit. A device known as the multimeter is used to find the voltage and current in the circuit. Ohm's principal discovery was that the amount of electric current through a metal conductor in a circuit is directly proportional to the voltage impressed across it, for any given temperature. Ohm expressed his discovery in the form of a simple equation, describing how voltage, current, and resistance interrelate:
V= IR equation (1)
This continuous movement of free electrons through the conductors of a circuit is called a current (I). Current is often referred to in terms of “flow. The force motivating...

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Experiment 5: RC Circuits
Abstract
The purpose of this lab is to learn and understand RC Circuits. An RC circuit is composed of at least one resistor and at least one capacitor. A capacitor is composed of two plates with either air or an insulator also known as a dielectric between the plates. We do not want the plates to be touching, because then we would only have a conductor. The insulator between the plates is also known as the dialectic, which affect how the capacitor will store charge. In an RC circuit, voltage will flow from the battery to the capacitor and through the resistor. When the capacitor is charging, the voltage across the battery is decreasing until the capacitor is fully charged. When the capacitor is fully charged, then the voltage through the battery is zero. That would also mean that the voltage of the circuit would drop until it is also zero. Now when the capacitor completely discharges, the voltage through the battery increases. We were able to measure the half-time of the charging and discharging of the capacitor by connecting the circuit to the oscilloscope with the signal generator providing the potential for the circuit. The time constant was calculated from the half-time of charging and discharging. The time constant is a measure of the length of time a capacitor took to charge and discharge. We used...

...ELEC 202 LAB1REPORT
INTRODUCTION TO LABORATORY INSTRUMENTS AND RESISTIVE
CIRCUITS
Objectives:
The aim of the first experiment is to become familiar with lab instruments, get an idea about
their working structure and how to use them when necessary. In addition to that in the first
part of the experiment our aim is to read color codes of resistors and get idea about how to use
multimeter for resistor measurements. In the second part of the experiment our aim is to see
the operation of function generator and DC voltage source, how to use multimeter to measure
AC and DC voltage and how to use multimeter to measure AC and DC current. After
completing these parts our aim is to see the operation oscilloscope and analyze simple
circuits.
Experimental work;
In the first part of the experiment we read the colors of given resistors. There were 4 resistors
in the kit. Three of them were same because their colors at the right hand side were same an
done of them was different. The color of 3 resistors were orange and other one was red so
when we looked at the color code table our three resistors were 10.000 ohm and other resistor
was 1000 ohm.
After using color table we determined the values of resistors by using multimeter. While
measuring the values of the resistor by multimeter it is important to not to hold it by two
hands since the human body has an effect on it and...

...ZEIT 1206 DEC1 LabReport1
DC Circuits - Analysis and Design
Alexander Glover, z3422512
Abstract
DC circuit analysis and design, play a massive role in electrical engineering and without the correct application of theory and practise in unison, nothing can be achieved in a true engineering sense. Engineering requires theory to develop and test constraints while also requiring practical application of theory in order to determine tolerance and practical results for industry purposes. The ability to analysis a circuit gives a potential electrical engineer the ability to learn how to problem solve in a theoretical and practical sense which in turn develops industry skills in which will follow them for life, and allow a solid knowledge base for the rest of their career. This report covers the analysis of a DC circuit in order to determine unknown values within a circuit and covers the design process of a DC circuit when specific voltages are required and current and resistors values are unknown.
Introduction
This laboratory focuses predominately on DC circuit analysis and design although, as a result of this, many fundamental aspects of electrical engineering and circuit theory are brought to light. Without the knowledge of circuit theory and fundamental DC circuit...

...TO: 1201 Section-002 Instructor
FROM: Engineer Student
DATE: February 16, 2015
RE: Electrical Circuit Project LabReport
The purpose of the Electrical Circuit project was to prepare students with the ability to work with mathematical and engineering calculations to design a breadboard. In order to create a breadboard with an accurate voltage drop between nodes, the resistor combinations and calculations need to be correct.
Calculating the voltage drop between nodes was done through the use of the five nodes provided in class. In order to correctly set up the breadboard, the calculations were used to determine which set of resistors needed to be matched together. Each color on the resistor represents the resistor’s value. The first and second bands represent the first two digits of the resistor value, the third band represents the multiplier, and the fourth band is the tolerance. After adding up the total resistor values, it is significant to match up the resistors to create a total of the calculated result of voltage drops between nodes. A schematic that illustrates my breadboard was done through Microsoft Visio and included in my Electrical Design Package.
The breadboard was tested in class through the use of a voltmeter and a battery. The outcome of this project provides an understanding that the calculations play a significant role in the accuracy of the overall result of success. If the calculations were...

...Ohm’s Law II
Abstract:
The purpose of this experiment is to demonstrate how non-ohmic devices respond on a direct circuit. Furthermore, we also explored their behavior when they were connected in different configurations. In order to accomplished this we used a capacitor, diode, resistor, and battery. We ran a series of experiments that generated graphs and equations, which can explain the relationship between voltage and time for capacitors and diodes. Non-ohmic resistors are also referred to as non-linear because a plot of voltage vs. current for such a resistor will not be a straight line. These graphs also exemplified non-ohmic devices express no resistance, and can have a variety of applications on our daily lives. Furthermore, results obtained during this experiment showed us the relationship between voltage and time on a capacitor. On the graphs we can appreciate how the capacitor quickly looses its voltage after being charged and then disconnected. Hence, indicating that in a direct circuit unit the current is one directional, meaning it only travels in one direction. Similarly, a capacitor stores voltage, and it does not matter if we change the direction of the current, as it will only be functional in one direction.
Procedure: |
A capacitor consists of two Conducting Plates separated by an insulating material or dielectric. Figure 1 and Figure 2 are the basic structure and the schematic symbol of the capacitor...

... LabReport1. Problem: To find the density of a Hershey chocolate bar.
2. Hypothesis: I think the chocolate bar will gradually decrease in density as it gets smaller.
3: Materials: 1 whole Hershey chocolate bar, ruler, triple balance beam, tray, calculator.
4. Procedure: First, find the mass, volume, and density of an entire Hershey Bar. Then, systematically, break off one section at a time to calculate the mass, volume, and density for 3/4, 1/2, and 1/4 of the candy bar, finally, record your results in the data table.
5. Data table
Mass
Volume
Density
Whole Bar
46.8
22.4
2.10 cm/3
3/4 of bar
25.9
16.68
1.60 cm/3
1/2 of bar
20
102
5.1 cm/3
1/4 of bar
9.9
4.77
2.08 cm/3
6. Analyze data:
Does your hypothesis agree with the results of the experiment?
Yes. My hypothesis was the chocolate bar will gradually decrease in density as it gets smaller. According to the chart below, not only did the density decrease, but the mass and volume decreased as well. To reiterate, my hypothesis agreed with the results of my experiment.
7. Conclusion: In conclusion, after doing this experiment, I learned that under stable conditions...