Abstract:
In this lab, students were introduced to the field of electrical engineering. The objectives of the lab were to determine the resistance of a resistor using various methods and to also verify Ohm’s Law. In the lab, the students were instructed to calculate the resistance by using color codes, measuring the resistance using a Digital Multi Meter, calculate the average resistance from 10 voltage and current measurements, and find the graphical resistance using a trend line. The results show that the average resistance calculated from 10 voltage and current readings and the graphical resistance were closest to the measured resistance, while the color coding resistance was furthest off. Introduction:

Georg Simon Ohm established that current (I) in a wire is proportional to the voltage (V) applied to its ends. How much current flows in the wire depends on the voltage but also on the resistance (R) of the wire. A higher resistance yields a lower current for a given voltage. (I= V/R) This is known as Ohm’s Law, where V is measured in volts, I is measured in amperes, and R is measured in ohms. Electrical engineers have to build devices that control the flow of electrons. Changing the shape or choosing different materials with different resistance are ways that they do this. A resistor is a passive electronic component that goes against the electric current. Passive components do not require a power source in order to perform. In this lab, we measured the resistance of a passive resistor. Pictured below are examples of a simple resistor and an a simple circuit that shows how Ohm’s Law works.

Procedure:
First, the group had to record the manufacturer, part number and serial number of the Direct Current (DC) power supply and of the Digital Multi Meter (DMM).
They are as follows:
Manufacturer| Part Number| Serial Number|
Tektronix| CDM250| TW54020|
Tektronix| PS280| TW60392|

...Introduction to ElectricalEngineering: Lab 1
I. Purpose
This lab was performed in order to become familiar with measuring voltage, current, and resistance using a voltmeter, ammeter, and ohmmeter. In addition, the property of electrical resistance will be studied with three different types of sensors. Lastly, the resistance associated with a small audio speaker will be explored.
II. Introduction
Three basicelectrical concepts were examined in this lab: voltage, current, and resistance. Voltage is a force measured in work per charge across a circuit. Voltage is measured in volts and originates in a power source, such as a battery. Only DC voltages, or constant voltages, were used in this lab. Current is the rate of flow of charge through an element and is measured in amperes. Lastly, resistance is a measurement of the force opposing a current through an element. Resistance is measured in ohms, Ω.
Voltage, current, and resistance are all related in Ohm’s Law, a useful equation used repeatedly in the lab. Ohm’s Law states that voltage= current times resistance. The Kirchoff voltage law is also used in this lab. This law states that the sum of voltages through a closed loop is equal to zero. Both Ohm’s Law and the Kirchhoff voltage law are used to check measurements obtained in the lab and are very useful in...

...ELECTRICALENGINEERING LABORATORY SESSION 1
Title: RESISTOR NETWORKS
Name:Richard Lancaster
Date: 11th Sep 2010.Student Name: Richard Lancaster.
Id No: (09099972)
Course: B.Sc. Engineering Science
Subject: ElectricalEngineering
Lecturer: Dr Martin Hayes
Objectives:
1. Introductory familiarisation with D.C measurements.
2. Introduction to the use of pSpice as a tool for emulating circuits.
pSpice v9.1 can be downloaded from Moodle or via
http://www.electronics-lab.com/downloads/schematic/013/
3. Verification of the fundamental laws of Electrical Science.
4. Familiarise students with the process of Laboratory Report Writing and Submission for this module
EQUIPMENT:
Power Supply
Breadboard
Various Resistors
Multimeter
Leads
Laptop running pSpice Student Edition v9.1
Procedure
For each of the following circuits :-
(i) Generate a pSpice schematic that determines voltages and currents at all points of interest.
(ii) In a UL setting (note this step will be necessary only for Lab1 and one other lab during the course of the semester) experimentally determine the voltage at the Node A and the currents that are highlighted in each circuit.
(iii) For each circuit ensure that all results are presented in tabular form.
(iv) You should explicitly compare your experimental results with your pSpice output in the tables that you generate.
The...

...ElectricalEngineering Fundamentals
Basic Concepts and Ohm’s Law
EEF 1
ECS1300L
Dr SMR Jones
Resistance
• In 1827 Georg Simon Ohm published the results of
experiments using the recently invented
electrochemical cell, invented by Italian Count
Alessandro Volta.
• Ohm found that the electrical current (I) flowing
through a sample of material was directly proportional
to the voltage (V) applied across the sample, i.e.
V
R
I
• This is known as “Ohm’s Law”.
• The constant of proportionality, R, is known as the
resistance of the sample
• Resistance is measured in Ohms, symbol [ V/A]
• We can write Ohm’s Law three ways:
• V/I = R,
V = IR,
I = V/R
Fundamentals of ElectricalEngineering, SMRJ 2014
2
Resistivity
• Further experiment shows that the resistance increases in direct proportion to the
length of the sample and reduces in inverse proportion to the cross sectional area, i.e.
A
• The constant of proportionality, , is always the same for a given material.
is called the “resistivity” and has dimensions of m
R
• Resistivity is a measure of how hard it is for current to flow through a material under
the influence of an applied electric potential.
Fundamentals of ElectricalEngineering, SMRJ 2014
3
Conductance and conductivity
• It is sometimes useful to use the reciprocal of resistance, i.e. the ratio of I/V
• We call this the conductance, G, i.e.
I
1
G...

...Topics | Issues Under Debate |
Abortion
See also
"Population Explosion" | * What limits are responsible? * What limits are realistic? * How to protect abortion doctors, pregnant women and the unborn protection of abortion clinics vs right to protest * Partial birth abortion * Scientific evidence vs definition of viability * Stem cell research * Unborn victims of violence |
Affirmative Action
See also "Racial Discrimination" | * Relative equality has been achieved vs serious inequities continue * Can racial balance in business, education, military be achieved without policies that promote Affirmative Action * Reverse discrimination * NOW, National Organization for Women |
AIDS | * Rights of the individual vs community safety (or campus safety) * Funding for research * U.S. obligation to third world countries * Manufacturing of generic drugs vs U.S. pharmaceutical companies * How contagious diseases "jump" from animal hosts to human |
Alcohol on Campus | * Limits for campus safety vs personal freedom * Implications on violence and crime * Issues with binge drinking |
Alcohol and Driving | * Leniency because of condition vs community safety * Revoking drivers license vs being able to attend classes and work * The inequitity state by state of convictions * Age discrimination of violators |
Animals | * Animal rights vs medical research * Humane treatment of animals vs factory farms * Animal welfare in...

...16176735
Title of the experiment: Power Measurement in 3 Phase Circuits.
Laboratory group: Thurs 1200-1400
Laboratory supervisor:
Laboratory partners: Matthew Sargent
Naveed Yapa
Date performed: 15th August 2013
Due date: 29th August 2013
Date submitted: 29th August 2013
I hereby declare that this report is entirely my own work and has not been copied from any other student or past student.
Student signature: --------------------------------------------------------------
Power Measurements in 3 Phase Circuits.
Introduction
Power dissipated in a 3 phase circuit can be measured be various means, but for this laboratory report, we will explore how accurate the single and two wattmeter method can be in recording power.
Aim and objectives
The aim of this laboratory is to effectively measure power in a three phase electrical circuit by various power meter connections of: Two Wattmeter Method and the Single Three Phase Wattmeter Method for a variety of circuits:
* Balanced STAR Connection.
* Balanced DELTA Connection.
* Unbalanced Star Connection.
Theory
A three Phase circuit is an electrical circuit that delivers 3 cycles within a 360 degree time span. These cycles are 120 degrees apart and can be either unbalanced or balanced with a STAR or DELTA connection. There are many ways to calculate and measure power in a 3 phase circuit but for this laboratory, the Two...

...as we did on the latter board. Finally, we went back to the wooden board and connected the circuit with a Zener diode. Then, we measured the voltage across the resistor while using the PASCO interface to look at the output voltage and the voltage across the resistor.
Theory:
Electrical current is the amount of charge passing by a given point in a conducting path (circuit) per unit time: I= dQ/dt. It is agreed for convenience that the direction of the current is the same as the direction of movement of positive charges in electric field. In a metallic conductor, such as a wire, the only mobile particles are negatively charged electrons, which move in a direction opposite to that chosen for the conventional current. Ohm's law states that the current I that flows in a circuit is directly proportional to the voltage V across the resistance R of the circuit, or in mathematical form: I = V/R
A device is said to be " Ohmic" if the current I that flows through the circuit is directly proportional to the potential difference across the resistance. In other words, if V is doubled then I is doubled. If an "ohmic" device obeys the preceding criteria, then it follows that a "non-ohmic" device does not.
In this lab, we calculated the equation theoretically, from the equation q(t) = q0e-t/RC we get V= V0e-t/RC then V/V0=e-t/RC take the natural log, Ln (V/V0)= -t/RC , rearrange the equation and we get: t = -RC ln (V) + RC ln (V0)
Data: Graph 1:...

...Table of Contents
Abstract……………………………………………………………………………………………2
Introduction………………………………………………………………………………………..2
Background………………………………………………………………………………..2
Objectives…………………………………………………………………………………2
Scope………………………………………………………………………………………3
Theory review……………………………………………………………………………………..3
Design of report…………………………………………………………………………………...5
Procedures…………………………………………………………………………………………5
Results……………………………………………………………………………………………..6
Discussion…………………………………………………………………………………………6
Conclusion………………………………………………………………………………………...7
Reference……………………………………………………………………………………….....7
Appendix…………………………………………………………………………………………..7
ABSTRACT
This experiment introduces the use of dimensionless analysis and conventionally analytical method to survey the performance of centrifugal pump. The end of this experiment points out the benefit of using the “new” method to the conventional in most practical problem, especially in the survey of turbo-machine. Also, through this experiment, students know some basic indexes to assess the efficiency of pumps used. We will that for the specific fan conducting this experiment, the best efficiency point occurs at CQ = 0.2, the specific speed NS ~1.23.
INTRODUCTION
Background
A fan is a turbo-machine in which work is done to increase the total pressure of the fluid leaving the device. This is achieved by a rotor or impeller, which is driven by an external source of power to move a row of blades so as to...

...Daphny Maldonado
Bio Lab 2107
Kiah Britton
W 10-12:30
Is H20 Bad for You?
Abstract:
In the village of Gopher Hollow there’s a cluster of Blue Baby Syndrome. There were
four infants affected by this cluster. The families from the infants would collect their
water from wells. We have to determine what’s the source of the high levels of nitrites in
the water. The four sources that could be the point of contamination are a new
subdivision, textile plant, an organic farm, and a mountain lake. We had to ﬁnd the
concentration of each known standard and unknown standard. We did this by using a
spectrophotometer. The results were the following, the organic farm with a herd of 50
cows and a 10 acre ﬁeld of zucchini had the highest levels of nitrites.
Introduction:
Blue Baby Syndrome is a condition that affects many infants. This condition makes
the baby’s skin turn blue because of the lack of oxygen. This condition can exhibit
lethargy, vomiting and not being able to breathe. It can even lead to death in rare cases.
This condition is caused by the excess amount of nitrate that is then converted into
nitrite by the digestive system. The hemoglobin then reacts with the nitrites to form
Methemoglobin. Methemoglobin is not a problem in adults since they have an enzyme
that converts methemoglobin back to hemoglobin. Infants don’t have many of the
enzyme to convert methemoglobin to hemoglobin, resulting in Blue Baby Syndrome. For
example in Gopher...