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Questions

1. An electron that has left the parent atom is called a ___free___ electron.

2. What is the voltage between two points if 100 J of energy is used to move 20 C between the points? V= WQ = 100J20C =5JC =5 V

3. How many electrons are there in a charge of 0.005 C? 3.12 ×1016

4. How much energy is required to move a charge containing 2.5x1013 electrons through a potential difference of 12 Volts? 43μJ

5. A charge of 500 mC (milli Coulombs) flows through a wire in 25 mS. What is the current? 20 A

6. A charge containing 3.7x1014 electrons flows through a wire in 150 uS (micro seconds). What is the current? .3933 A or 393.3 mA

7. A current of 5 mA flows through a wire for 10 seconds.
How many electrons were involved? 3.12 x 1017

8. A battery has a rating of 1500 mA-Hr. The battery supplies 75 mA to an electric circuit. How long will the battery last? 20 Hr

9. Semiconductors exhibit characteristics of
a. insulators
b. conductors
c. both a and b

10. True / False

a. A voltmeter must be connected across a component to make a proper measurement. T b. An ammeter must be connected in series with a component to make a proper measurement. T

...TCO 1) What is the purpose behind the five primary activities in the value chain?
First, info flow diagrams and flowcharts argon the two most much utilize development and musical accompaniment tools employ today. Second, since systems developme nt is super complex, DFDs and flowcharts ar! e tools that are used to fix order from sanatorium and complexity.Â (Ch 3, p. 50)| | | Â | Points Received:| 4 of 5| Â | Comments:| First, data flow diagrams and flowcharts are the two most frequently used development and documentation tools used today. Second, since systems development is extremely complex, DFDs and flowcharts are tools that are used to create order from chaos and complexity.| |
TCO 1) Name two reasons why it is important to have a working knowledge of DFDs and flowcharting. (Points TCO 1) Name two reasons why it is important to have a working knowledge of DFDs and flowcharting. (Points
The flow diagram and the flowcharts are the two more common systems use. Also when it comes to the system development they can get very complex meaning that the DFD and the flowchart are tools that can be used to create order form chaos and complexity.
TCO 1) What is the purpose behind the five primary activities in the value chain?
First, info flow diagrams and flowcharts argon the two most much utilize development and musical accompaniment tools employ today. Second, since systems developme nt is super complex, DFDs and flowcharts ar! e tools that are used to fix order from...

...Sixth Edition, last update July 25, 2007
2
Lessons In Electric Circuits, Volume II – AC
By Tony R. Kuphaldt Sixth Edition, last update July 25, 2007
i c 2000-2010, Tony R. Kuphaldt This book is published under the terms and conditions of the Design Science License. These terms and conditions allow for free copying, distribution, and/or modiﬁcation of this document by the general public. The full Design Science License text is included in the last chapter. As an open and collaboratively developed text, this book is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the Design Science License for more details. Available in its entirety as part of the Open Book Project collection at: www.ibiblio.org/obp/electricCircuits
PRINTING HISTORY • First Edition: Printed in June of 2000. Plain-ASCII illustrations for universal computer readability. • Second Edition: Printed in September of 2000. Illustrations reworked in standard graphic (eps and jpeg) format. Source ﬁles translated to Texinfo format for easy online and printed publication. • Third Edition: Equations and tables reworked as graphic images rather than plain-ASCII text. • Fourth Edition: Printed in November 2001. Source ﬁles translated to SubML format. SubML is a simple markup language designed to easily convert to other markups like A LTEX, HTML, or DocBook using nothing but...

...To design a simple electrical circuit for Doctor's Surgery to let people know when to enter and also to research and learn more about parallel and series circuits.
Introduction
I am going to design an electric circuit for a Doctor's surgery.
There are two types of circuit's Parallel circuit, and Series circuit.
First I am going to explain what a circuit is and what the differences they have are.
An electric current is a flow of charge. The charges are given energy and made of flow using a cell or a battery. Charges can flow easily through connecting wire. The cell, wires, lamp and a switch, all these components are connected together and make a loop called a circuit.
Current will only flow through a component if there is a voltage across that component.
Voltage is the driving force that pushes the current round.
Parallel Circuit
In a parallel circuit you can add more components without the need for more voltage.
In a parallel circuit a failure of one component does not lead to the failure of the complete circuit, this is because a parallel circuit has more than on loop and all have to fail in more than one place before the other components fail.
Series Circuit
In series circuit (which I will be designing for the surgery) is a loop of wire with its ends connected to an...

...Parallel Circuits
Name:_____________________________________________
Directions:
1. Go to the following website:
http://phet.colorado.edu/en/simulation/circuit-construction-kit-ac-virtual-lab
2. Click “Run now.”
You now have the raw material to create a circuit. Take a moment to look over the site and find all the different materials. To build a circuit you will need several wires, a light bulb, a voltage source, a voltmeter, and a non – contact ammeter. Play with it to see how to grab and manipulate these tools.
Click the reset all button.
A. Series Circuits
Build a simple series circuit that consists of 4-6 pieces of wire, 1 light bulb, and 1 battery (voltage source). In order to complete the circuit, the red circles at the end of each must overlap. Please note that the light bulb also has TWO circles. Your circuit is complete and working when the light comes on and the blue dots begin moving.
What do you think that the moving blue dots represent? (2 points)
Explain what a battery does in an electrical circuit? Refer to page 606 in your textbook. (3 points)
Click in the Tools boxes to get a voltmeter and a Non-contact ammeter. Put the voltmeter near the battery and place the red tab at one end and the black at the other
What is the voltage (V)? (2 points)
Voltage:_______...

...Ariana Varveris
November 30, 2014
Part 1: Answer the following questions (20 points)
1. Name and describe the components needed to make a complete circuit. A complete circuit requires a battery, wires and a light bulb.
2. Compare and contrast a series and parallel circuit. Give at least one way that they are alike and one way that they are different. Both series and parallel circuits must have all the components of a completecircuit in order to work. These two circuits differ in the way the electrons are able to flow. In a series circuit the electrons flow in one direction and along one path only while in a parallel circuit the electrons may flow through different paths along any complete available circuit. In a parallel circuit more electrons will flow through the circuit as compared to the series circuit.
3. Ohm's law is represented by the equation I = V/R. Explain how the current would change if the amount of resistance decreased and the voltage stayed the same. Ohm’s law states current is dependent on voltage and resistance. As in any mathematical equation if we change one variable in the equation on one side and leave the other variable constant, the other side of the equation will change as well. In this case since current is equal to voltage divided by resistance. If we keep voltage the same and...

...Measurements of Capacitance and Inductance
Purpose: To use equipment and techniques to determine the structure of a hidden series RLC circuit and to measure the values of the various components in that circuit.
Theory:
To see how an RLC circuit works, consider the circuit in Figure 1 with the capacitor initially charged.
Fig. 1 RLC Circuit
Since there is a conducting wire connecting the negative side of the capacitor to the positive, a current will begin to flow in the counterclockwise direction. As it does, several things happen. The first is that the resistor will begin to strip energy from the current and convert it to thermal energy. The second is that the current through the inductor will result in a magnetic field. However, since the current is transient (not constant), the magnetic flux through the inductor is not constant, resulting in an emf across the inductor, pointing in the opposite direction of the voltage across the capacitor.
Once the capacitor is discharged, the emf in the inductor, in trying to prevent the change
in magnetic flux, will result in a current in the opposite direction. This causes an opposite charge to start building up on the capacitor. The negative charge will be on the upper plate. This transient current will continue to flow until the capacitor is charges and the magnetic flux through the inductor becomes zero. At this point, the...

...RC Circuits
•In this presentation, circuits with multiple batteries, resistors and capacitors will be reduced to an equivalent system with a single battery, a single resistor, and a single capacitor. Kirchoff's laws will be stated, and used to find the currents in a circuit. In addition, the equation for the time-constant of an RC circuit will be derived.
Ohm's Law
When a battery is connected to a resistor, the battery will cause a current to flow through the resistor. The larger the voltage and smaller the resistance the greater the current.
V = IR
More Concepts
Current is the rate of flow of charge around a circuit.
dQ What actually flows in a circuit is electrons, but electrons are I= negatively charged and current is positive. The current always dt points the opposite direction as the electrons. The unit of Current is the Ampere and is defined to be one coulomb per second.
Resistivity
The resistance of a resistor depends on both the material the resistor is made of and the geometry of the resistor. The longer the resistor the greater the distance electrons must travel and the more times they can collide with other objects. The longer the material the greater the resistance. The wider the resistor the larger the path. A wider resistor is like a wider road or a larger pipe it allows more room and easier flow. The resistance is inversely proportional to the...

... 1kΩ and 4.7kΩ, digital multimeter(DVM), bread board.
INTRODUCTION
Some circuits require more than one voltage source. Superposition theorem is a way to determine currents and voltages in a linear circuit that has multiple sources by taking one source at a time. the current in any given branch of a multiple-source linear circuit can be found by determining the currents in that particular branch produced by each source acting alone, with all other sources replaced by their internal resistances. The total current in the branch is the algebraic sum of the individual source currents in that branch.
Thevenin’s theorem provides a method for simplifying a circuit to a standard equivalent form. This theorem can be used to simplify the analysis of series-parallel circuits. The Thevenin’s equivalent voltage (VTH) is the open circuit (no-load) voltage between two specified output terminals in a circuit. The Thevenin’s equivalent resistance (RTH) is the total resistance appearing between two specified output terminals in a circuit with all sources replaced by their internal resistance.
Another method for simplifying a circuit to an equivalent form is Norton’s theorem. By reducing all of the element of a complex circuit to a single current source and a single source resistance, which supply power load, a simple circuit can be...

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