Electric Fields Lab

In: Science

Submitted By Joshuabic
Words 650
Pages 3
Name: Joshua Bickerstaff Electric Fields

Go to http://phet.colorado.edu/simulations/sims.php?sim=Electric_Field_Hockey

and click on Run Now.

1. You rub balloons in your hair and then hang them like in the picture below. Explain why you think they move apart and what might affect how far apart they get. They move apart because when rubbed on your hair the balloons become negatively charged. This happens because the protons and neutrons leave the balloon and become attached to your hair. Since both balloons have negative charge they repel from each other and the more charges the farther they will move away from each other.

2. Test your ideas using Electric Field Hockey in the Practice mode. Make a table to record your observations about what affects the direction and speed of the puck. Your table should demonstrate that you have run controlled tests with all the variables.
| |Electron |Proton |
|Puck is Positive |The puck moves closer and the closer they are |The puck moves away and the closer they are the|
| |the faster it moves and the more electrons |faster it moves away and the more protons there|
| |there are the faster it moves. If the |are the faster it moves away. If the protons |
| |electrons are on opposite sides of the puck |are on opposite sides of the puck then they |
| |then they will cancel each other out and the |will cancel each other out and the puck will |
| |puck will not move. |not move. |
| Puck is Negative |The puck moves away and the closer…...

Similar Documents

Electric Field Lab

...sim=Electric_Field_Hockey and click on Run Now. 1. You rub balloons in your hair and then hang them like in the picture below. Explain why you think they move apart and what might affect how far apart they get. ANSWER: The transfer of static electrons as the balloons rubs increases each balloons electrostatic charge. Since they are both the same charge, the electromagnetic fields generated repel each other. The distance the balloons repel each other could be affected by how long the balloons are rubbed together as well as the moisture level of the air and balloon material. A more humid environment would limit the potential for static buildup, and a balloon made out of paper would not easily hold a static charge, because wood is a good insulator. It doesn’t easily conduct electricity, which is why trees sometimes appear exploded from lightning strikes. The lightning literally ripped through the tree. The number of electrons that are charged in each body is also a possible factor, which ties into what type of material the balloons are. 2. Test your ideas using Electric Field Hockey in the Practice mode. Make a table to record your observations about what affects the direction and speed of the puck. Your table should demonstrate that you have run controlled tests with all the variables. ANSWER: # of Positive Charges # of Negative Charges Charge Placement (Relative to puck) Result 0 2 Goal Center Puck is drawn to goal more quickly 0 1 Goal......

Words: 713 - Pages: 3

Electric Machines

...Computer Science 6.685 Electric Machines Class Notes 1: Electromagnetic Forces c 2003 James L. Kirtley Jr. September 5, 2005 1 Introduction Bearings Stator Stator Conductors Rotor Air Gap Rotor Conductors Shaft End Windings Figure 1: Form of Electric Machine This section of notes discusses some of the fundamental processes involved in electric machinery. In the section on energy conversion processes we examine the two major ways of estimating electromagnetic forces: those involving thermodynamic arguments (conservation of energy) and field methods (Maxwell’s Stress Tensor). But first it is appropriate to introduce the topic by describing a notional rotating electric machine. Electric machinery comes in many different types and a strikingly broad range of sizes, from those little machines that cause cell ’phones and pagers to vibrate (yes, those are rotating electric machines) to turbine generators with ratings upwards of a Gigawatt. Most of the machines with which we are familiar are rotating, but linear electric motors are widely used, from shuttle drives in weaving machines to equipment handling and amusement park rides. Currently under development are large linear induction machines to be used to launch aircraft. It is our purpose in this subject to develop an analytical basis for understanding how all of these different machines work. We start, however, with a picture of perhaps the most common of electric machines. 2 Electric Machine......

Words: 5431 - Pages: 22

Electric Circuits

...Chapter 17 Electric Potential Units of Chapter 17 • Electric Potential Energy and Potential Difference •Relation between Electric Potential and Electric Field •Equipotential Lines and surfaces •The Electron Volt, a Unit of Energy •Electric Potential Due to Point Charges •Potential Due to Electric Dipole; Dipole Moment •Capacitance, Dielectrics and Storage of Electric Energy Electrostatic Potential Energy and Potential Difference The electrostatic force is conservative – potential energy can be defined as ΔPE= -W Change in electric potential energy is negative of work done by electric force: W =Fd=qEd Electric potential is defined as potential energy per unit charge: Unit of electric potential: the volt (V). 1 V = I J/C. Only changes in potential can be measured, Electrostatic Potential Energy and relation between Electric potential and Electric field Analogy between gravitational and electrical potential energy: Work is charge multiplied by potential: Work is also force multiplied by distance: If the field is not uniform, it can be calculated at multiple points: Solving problems Example 17-2: suppose an electron in a picture tube of television set is acclerated from rest through a potential difference of Vb-Va = Vba = + 50000V. (a) What is the change in electric potential energy of the electron? (b) What is the speed of the electron as a result of this acceleration? Equipotential Lines Electric potential can be represented with......

Words: 961 - Pages: 4

Lab V, Problem 5 Determining Magnetic Field of a Coil

...Abstract: The object of this lab was to determine the relationship between the strength of a the magnetic field of a Helmholtz coil and the distance from the coil, along its central axis. Calculations for this relationship are in the predictions section below. The field was measured at eleven different points (5 on each side and one in the center) and recorded using a Hall Probe. Introduction: The example given in the Lab Manual1 was for studying bacteria. Helmholz coil was to be used as a model to be used to mimic and quantify the behavior of magnetotactic bacteria in an environment in a magnetic field. A Helmholz coil will stand in place, to create the magnetic field lines and a Hall Probe and Magnet Lab software will be used to measure the strength of the field at varying distances. Prediction: Using the Biot-Savarte Law for a B-field of a current: [pic] Where μo is the permeability of free space. And the formula for magnetic flux through a surface: [pic] A formula to relate the strength of a magnetic field (B) in relation to the distance away from it (x) [pic] [pic] sin θ goes to 1 [pic] With the following substitutions: [pic] and [pic] (see Fig 1 below) We can then derive our final equation: [pic] N being the number of coils in the Helmholtz Fig 1: Geometrical proof of the substitutions used in the above formulas where dL is tangent to the circle. Fig 2:......

Words: 1040 - Pages: 5

Electric Music

...Electric Music The flashing lights, the bang of the bass, and the sweat pouring down my arms. The smell of the sketchy club that will be the stomping ground for the night and the huge amount of people within my view, moving similarly to an uneasy sea. I’ve lost all track of time; my legs have been in constant motion along with my fellow ravers for what feels like days. Techno is the one thing that draws everyone here, as if we were bees being drawn to a flower, the music is the nectar of our ears. We are drawn techno, a type of music that is very misunderstood. Techno is music created using synthesizers and other electronic instruments. Techno- electric music and raves; when many hear these words they most likely think of an underground club that is filled with drugs and drunk kids. This perception has been hanging over this scene for some time now. It seems that has all started to change. This once frowned upon practice referred to as raving and the music that accompanies this event, called techno, is now generally accepted. Now not only young people enjoy this music, a lot of middle- aged people do as well. Today it appears that this once dark practice is now coming to light. This once dark practice has been growing in popularity among the young people for a little over fifteen years. With this rise in popularity comes more than just acceptance. The rave scene needs two things; a DJ and a location. Generally a traditional DJ would take a request for a song, or throw......

Words: 1184 - Pages: 5

Energy and Potential in Electric Field

...EM Fields and Waves Assignment 1 Energy and Potential In Electric Field it solution Contents Introduction: 3 Electric Field Intensity: 3 Electric Field Strength (First Formula): 3 Electric Field Strength (Second Formula): 4 Energy: 5 Potential Difference and Potential: 5 Electric Potential at a point due to Point charge: 6 Potential Gradient: 8 Conclusion: 10 Table of Figures: Figure 1: Field is radial 8 Introduction: As we know that every electrically charged particle exerts an equal and opposite force on other charged particle/object. These electrically charged particles are surrounded by a field known as electric field. Electric field helps in depicting the force which these particles exert on each other. It is a vector field and its SI unit is NC-1. We use coulombs’ law to find electric field of different charged particles. But as it is quite complicated because of its vector analysis and integration for each component, we try to find a much simple way to find it, in which single integration can give us the required scalar quantity, which can be used to find electric field. This scalar quantity is known as potential or potential field. Electric Field Intensity: The electric field of a charged particle explains the strength of a charged particle depending on its distance from that specific point. The charge also tends to change that field accordingly when any other particle tries to......

Words: 1364 - Pages: 6

Electric Fields Lab

...Lab Report                                                                Name: ______Erica Donlon______                                                                                                   Section: ___________________     Electric Fields   Questions:   A. What generalizations can you make from this exploration? a. There should be an equal amount of positive and negative charge within the water. If the space was equal on both sides, then the potential lines should equal, but because there was more space between the upper charge and the wall of the container, the charges were more compact than the lower charge. The positive charge should have a higher amount of energy.   B. Where would a positive test charge have the least potential energy? b. A positive test charge would have the least potential energy when it gets closer to the negative test charge because as it gets closer, the potential energy of the positive charge decreases.   C. How much energy must you add to the system to move 1 electron 1 m in a direction along one of the equal potential lines? c. In order to move one electron one meter in a direction along one of the equal potential lines, you have to double the amount of energy in the electron just to get it to barely move.   D. If lightning strikes a tree 20 m away would it be better to stand facing the tree, your back to the tree, or your side to the tree? Assume your feet are a comfortable shoulder......

Words: 294 - Pages: 2

Electric Field Sensors

...In the lower left of the screen is a meter for indicating electric potential, in volts, created by the charge that you introduced. Record the voltage and turn on “Plot”. 4) This line is much like a line on a geologic topo map. Explain the similarity. 5) You are on the side of a hill with a topo map of the region. If you walked so that your trip follows a topo line you would be doing no work on your backpack. Why?. 6) If a second charge were placed on this line (don’t do it), how much work is need to move it along the line? 7) Move the meter closer to the charge at the center of the screen. What is the new electric potential? Turn on plot again 8) Remember that electric potential is energy per charge (1 volt = 1 Joule/Coulomb). Is electric potential a vector or a scalar? 9) If a second positive charge were introduced and moved from the first equipotential line created to the second line (closer to the charge), would this involve positive or negative work? 13) Explain. 10) If the second positive charge were moved away from the first Positive charge, would this involve positive or negative work. 11) When energy was studied earlier in the year, a connection was found between kinetic energy, potential energy, positive work, and negative work. What is the connection? 12) Click on “Clear All” Part 2 What is the relationship between the electric potential at a point in space and the distance from an electric charge? 1) Place a positive 1 nano-coulomb charge......

Words: 593 - Pages: 3

Ge Electric

... 12 Balanced scorecard 13 Strategic alternatives; 15 Final recommendations 16 Bibliography 19 Executive Summary During February 12 of this year the wholly owned subsidiaries GE, GESC, and GECC will be merged together. Part of it was the manufacturing actual physical business the other was the subsidiaries and the next was the financial services GE Capital. The merger of GE and affiliates is not reflected in his financial analysis as of February 12, 2012. This is a statistical analysis on GE. GE has different parts of the company, which use different terms. Not to be confused GE, GESC, and GECC are different sectors of general electric. Their consolidated financial statements help to better accurately comply with the different financial and accounting methods to give a precise perspective on the entire company. GE is the most common use term and the one that were most familiar with. GESC is the financial services department that looks like a bank; and, GECC is just a term used for subsidiaries across the world. Stakeholder Analysis GE has experienced significant growth in the stock price from the low teens to the upper 20s. However the historic high is 39.50 and is down roughly 54% from five years ago before the 2008 financial crisis. (Morning Star, 26) The dividend yield is currently $.68 worth 3% of the stock, which is extremely high indicating that...

Words: 8496 - Pages: 34

Electrical Field Lab

...Lab Report Name: ____________________ Section: ___________________ Electric Fields In step 9 you are asked to draw the conductors’ locations on the graph paper and label them with the voltage readings of your voltmeter. In step 10 you are asked “How far does this path go? Sketch this pattern on your graph paper and label the line with the voltage you chose” In step 12 you are asked to predict the path it would take by drawing a line with your colored pen or pencil. Questions: A. What generalizations can you make from this exploration? B. Where would a positive test charge have the least potential energy? A positive test charge would have the least potential energy next to the conductor at 0 volts. C. How much energy must you add to the system to move 1 electron 1 m in a direction along one of the equal potential lines? No work is needed to move 1 electron 1m in a direction along one of the equal potential lines D. If lightning strikes a tree 20 m away would it be better to stand facing the tree, your back to the tree, or your side to the tree? Assume your feet are a comfortable shoulder width apart. Explain your answer. If the person stood with the side facing the tree, the feet would be at different potentials and a dangerous shock could occur. If the field......

Words: 316 - Pages: 2

Electric Fields

... ELECTRIC FIELDS Laboratory No. 6 Written By: Ali Al-Qubbej Lab Section: 04 Lab Partner: Braden Jople Date Performed 09/03/14 Instructor: Dr. Huh ABSTRACT The main objective of this experiment was to map lines like those of the electric filed around charged objects, each having a different shape ranging from 1 V, 1.5V, 2V, 2.5V, 3V, 3.5V, and 4V. Positive charge means that the electric field is going away, while the negative charge means that the electric field is going in to the other side of the map. The apparatus provided during the experiment was, field mapping apparatus, special coated paper, “Energy One” variable power supply (model XP-4), digital multimeter (DMM), probes and graph paper. The theory behind this experiment is described in the form of: Es = - ΔV / Δs, where Es is the electric field related to the potential V, ΔV is the difference in potential between two adjacent lines of equipotential, and Δs is the distance between the same two equipotential lines. DATA ANALYSIS This experiment was to record the values and record them on the special coated paper to determine the electric field direction and the strength of the charge. Figure 1 shows the first section of the laboratory experiment, there were two circles both on the negative and positive coordinate; those circles have a charge of 0V and 5V respectively. The maximum and minimum electric field in figure 1 was 62...

Words: 527 - Pages: 3

Lab 16

...Name _____________Amber Green_______________________ Electric Fields – Lab 16 Go to HYPERLINK "http://phet.colorado.edu/simulations/sims.php?sim=Charges_and_Fields" http://phet.colorado.edu/simulations/sims.php?sim=Charges_and_Fields and click on Run Now. Part 1: What is an equipotential line and how is this simulation related to work and energy? 1) Turn on “Show Numbers” 2) Place a positive 1 nano-coulomb charge near the center of the screen. 3) In the lower left of the screen is a meter for indicating electric potential, in volts, created by the charge that you introduced. Record the voltage and turn on “Plot”. 4.1 V 4) This line is much like a line on a geologic topo map. Explain the similarity. They are both used to show 3d on a 2d surface. 5) You are on the side of a hill with a topo map of the region. If you walked so that your trip follows a topo line you would be doing no work on your backpack. Why?. No you are staying at the same elevation. 6) If a second charge were placed on this line (don’t do it), how much work is need to move it along the line? - 4.1 V 7) Move the meter closer to the charge at the center of the screen. What is the new electric potential? Turn on plot again 10.9 V 8) Remember that electric potential is energy per charge (1 volt = 1 Joule/Coulomb). Is electric potential a vector or a scalar? Scalar 9) If a second positive charge were introduced and moved from the first equipotential line created to the second line......

Words: 692 - Pages: 3

Lab Report

...distribution of charge and map the electric field by identifying the equipotential surfaces/lines around the charges. Four templates are investigated, such as parallel strips of metallic paint, concentric rings. In the lab, we confirm that the electric field line is orthogonal to the equipotential line. We can also demonstrate that as one gets closer to an electrode, the equipotential contours approach the shape of the electrodes. For the concentric template in the lab, we use additionally analytical calculation to demonstrate. We plot the graph of n vs ln(r/9.2) and we get the slope of the graph. It shows the linear relationship between n and ln(r/9.2). R2 = 0.99184 for the plot suggests a strong linear relation. Equal potential lines are closer when electric field is strong. Theory In this lab, we map the electric field between two charges electrodes by finding lines of equal potential. Once these are found, we construct the field map using the knowledge that the electric field lines are orthogonal to the lines of equipotential. Ideally, we are supposed to place on the electrodes by a direct current source such as a battery. Then, the two electrodes would form a charged capacitor whose field line geometry we should like to determine; however, this implementation is difficult. Therefore, in the lab, we allow a small current to flow from one electrode to the other by painting the electrodes on a plastics surface. In the theory, the electric field line is orthogonal to......

Words: 625 - Pages: 3

Lincoln Electric

...  ACP IBOM   International Business Strategy       Case Study: Management focus Lincoln Electric                   Presented by Raphaël ROBIN    Raphaël  ROBIN  Table of content       Introduction​………………………………………….page 2  …       The beginning of Lincoln Electric​………………..page 3  …       From the motors to the welders production​……..page 4  …       Becoming International​…………………………....page 4  …       A new era​…………………………………………...page 5  …       Conclusion​………………………………………….page 6  …       References​………………………………………....page 6  …         page 1/6    Raphaël  ROBIN    Introduction       A picture of John C. Lincoln    "The Welding Experts"     Created  in  1895  by  John  C.  Lincoln  ​   a  capital  investment  of  $200​   Lincoln  with ,  the Electric  Company  is  today  a  world  leader  in  the  design,  development  and  manufacture  of  welding  products,  archery,  robotic  systems,  equipment  oxyfuel  and  plasma  cutting  and  occupies  the  first  position  in  the  global  market  for  brazing  and  soldering alloys.    Lincoln Electric  continuously  invests in  the development of welding solutions to meet  the  specific  needs  of  customers  worldwide.  Choose  Lincoln  Electric  as  welding  partner is offer your company a wide range of equipment and consumables proven in  industrial  environments,  and  designed  to   meet  the  most ......

Words: 1028 - Pages: 5

Write-Up for Lab 10.1: Falling in a Gravitational Field

...Write-Up for Lab 10.1: Falling in a Gravitational Field PHYS121 Week 3 For this lab you will drop several objects from the same height and observe how they fall and how long each takes to hit the ground. Consider the following as you complete the lab and answer the Write-Up Questions below: * Do the objects fall at the same rate? * What if the objects are different sizes, does that make a difference? Questions: 1. The acceleration due to gravity calculated this way works well for objects near the Earth’s surface. How would you have to change the above equation if the object was 100,000 meters above the ground? (Note: this question refers to Newton’s equation for the force of gravity between two objects. How would that change if the radius of the earth or distance were increased by 100,000 meters. To help you answer this question, please review your textbook, chapter 3, Newton’s law of Gravitation section.) F= (6.67 x10-11N.m2/kg2)(m1)(m2)  100,0002 G is inversely proportional to the square of the distance from the center of the earth.  100 km above the earth's surface, g is reduced by a factor [6370/ (6370+100)] ^2 = 0.969  That would make it 9.51 m/s^2  6370 km is the radius of the earth.  For questions 2 and 3, please consult the textbook and additional research materials on Newton’s Second Law of Motion. Pay particular attention to mass, gravity, acceleration and how they inter-relate. 2. How does air resistance alter the...

Words: 445 - Pages: 2