Figure 2. A lab report is an account of an experiment and what was discovered during the experiment. The magnitude of the electrostatic force between two-point charges ql and q2 is given by Coulomb's law. clear adhesive tape, The study of the Coulomb forces among arrangements of stationary charged particles is called electrostatics. Once you rub the balloon to the sweater, it gathers electrons so that once you place the balloon other (sweater) ends up with a deficiency of electrons and becomes positively charged. Thus, the polarized material will experience a net attractive force. Repeat the procedure until you have experienced several sparks. You must use appropriate significant figures and scientific notation in your answers. The presence of the charged object above the plate of the electroscope, induces electrons within the electroscope to move accordingly. If the sticky side of both the tape. charges attract and acts along the line between the two point charges. The negative charges quickly left his body as he touched the doorknob as shown below. Global warming is one of the most important issues in the world. electricity concepts. School. The conductor has been charged without actually being touched with the charged rod, and its charge is opposite that of the rod. electrochemistry-lab-report-conclusion 2/5 Downloaded from uniport.edu.ng on March 3, 2023 by guest reaching down even to the molecular level. the source of this attraction is due to the presence of static electric charge. Experiment Title: Chemical Equilibrium and Le Chateliers Principle. In this section, you will observe the induced polarization of a neutral insulator and the transfer of charge by contact. The material gaining electrons now has more electrons and becomes negative. charged puck? At this point electrons will flow between the electroscope and the ground, giving the electroscope an overall charge. You do not need to repeat the question. The word electricity comes from the Greek word electron which means amber (a tree resin that has been fossilized). that does not conduct electricity), a charge cannot move very far (if at all). (That is, we want to show that the force is proportional to one of the charges.) with your partner what is happening when he touches the knob. Repeat the demo several times. Using the values from the experiment, we found that the slope of the line is 1.51. What is the average distance a spark will jump? Objectives To observe electrical conductivity of substances in various aqueous solutions To determine of the solution is a strong or weak electrolyte To interpret a chemical reaction by observing aqueous solution conductivity. Because the wall is also an electrical insulator, the charge is not immediately discharged. sweater due to the rubbing and the balloon essentially attracts to the electrons. Be prepared to start your timer. In this simulation, a little different model is used. Rub Johns foot on the floor to demonstrate charge transfer. attachment_2. If so, how do you account for the difference? These equations will verify this statement: -Vs+Vr1+Vr2=0-5v+1. The answers from #2 and #3 support the results from the investigation since the The arrows on the puck are illustrating how both the positive and After that, I then The c. What do you think would happen if you use 2 charges instead of one to make the puck They are composed of atoms that consist of negatively charged electrons moving in quantum motion around a positively charged nucleus. Time up to five minutes, if necessary. static-electricity_en, The negatively charged You must use appropriate significant figures and scientific notation in your answers. An empty meter should appear; to start the measurement press the green 'play' button at the top of the screen. Comment in your notes. It is created when materials are pulled apart or rubbed together, causing positive (+) charges to collect on one material and negative (-) charges on the surface of the other. Some materials will The repel, and objects of opposite charges attract. iii. Materials: They are classified as Nan-electrolyte compounds. The magnitude of the electrostatic force between two-point charges ql and q 2 is given by Coulomb's Please write answers direct on the PDF file. A new classified U.S. Dept. When charge was transferred to the top, the gold leaves would become charged and repel each other. Electrostatics, as the name implies, is the study of stationary electric charges. In most of the exercises, you do not take data, but record a short description of your observations. Typically, lab reports present data, discuss results, and provide conclusions. Make sure that they understand that this is commonly called grounding. They were attracted to USW00094728 Please help with lab report discussion and conclusion. Move the sliding ball in steps of 0.5 cm for each new measurement. The negatively charged balloon repels the negatively charged electrons, thus forcing them to move downwards. When a charged object is brought near the electroscope, the gold Different materials have different desire for electrons; this is called electronegativity. Most materials are electrically neutral they have an equal USW00094728 Using Coulombs law, we can explore the effect of the distance, between two charged 12 Test Bank - Gould's Ch. Recordtheforceonq 1 byq 2,F 21 andtheforceonq 2 byq 1,F 12 . Hold the rod in this position, and briefly touch the top of the electroscope with your other finger. game. where \(F_{\textrm{E}}\) is the electrical force between any two stationary charged particles with charges \(q\) and \(Q\) (measured in coulombs), \(r\) is the separation between the charges (measured in meters), and \(k\) is a constant of nature (equal to 9109 Nm2/C2 in SI units). For an additional credit of 2 mills, use Excel to fit a power-law curve to the data. SHOW ALL CHARGES and ask the students to write observations and include drawings and Other materials such as glass are insulators. Then bring the rod near one of the balls. For your records, you may print out your Excel file with a table and graph of your numerical observations and any other electronic files you have generated. Later, other materials were found which exhibited this same behavior. Static electricity occurs whenever you have an accumulation of one type of charge. Charge sticks on an insulator, but does not move freely through it. Once the electrons leave the plate and enter the needle, both plate and support/needle acquire an imbalance of charge. have entered this once neutral region). Use a Google Spreadsheet to document your data, graph and determine the equation for the relationship. Surrounding a charge there is an invisible electric field which gets weaker the farther away one gets from the charge. Talk about the similarities and Theory When objects are rubbed against each other they acquire electric charge. Describe the materials and fabrics that you found: would be stationary. Observe what happens with the electroscope needle. This lab was divided into two major parts namely part 1 were you will verify Ohm's law by developing a variation of voltage (V) against current (I . To conduct this experiment, I first filled him up with a lot of negative charges. The lab uses an internet application to demonstrate how equal and opposite charges on pith balls create a repulsion force that . Charged particles exert electrical and magnetic forces on one another, but if the charges are stationary, the mutual force is very simple in form and is given by Coulomb's Law: \begin{eqnarray} F_{\textrm{E}} &=& kqQ/r^2, \end{eqnarray}. 4 Pages. University Physics - OpenStax 2016-11-04 University Physics is a three-volume collection that meets the scope and sequence requirements for two-and three-semester calculus-based physics courses. Volta characterized it as an inexhaustible source of charge. We can observe attraction and repulsion between electrically-charged objects. Record this distance in your notes. each other. what happens and then repeat the demo. If a neutral material is placed inside a weak electric field, it will not experience a net force, Rub the lucite rod vigorously with the silk cloth. the positive charges of the sweater instead of each other. Finally, consider the different concepts in which James Clerk Maxwell did research, and give an example of one of these concepts in use in your life. PHY 2 Lynn University Electrostatics Lab Report . With the electroscope deflected as a result of the operations above, bring the charged lucite rod near the electroscope again. Bring the lucite rod near the electroscope again so that it is deflected. Objects of the same electric charge negative charges affect the puck when displayed in the hockey game. force on the like charges farther away. Lab 1.Electrostatics Goals To understand and verify the behavior of the two kinds of charge, denoted "positive" and "negative", respectively. Remove the lucite rod. Neutral particles do not interact with electrical forces. You do not need to measure the position of its center, but will record the position of its inside edge. Describe potential sources of error (don't say human error). force. Where does the energy that makes the sparks and lights the tube come from? 4) For each of the following objects, determine whether they are repe. Conclusions Summarize what you learned in the lab, with specific references to the scientific concept under study which you detailed in the introduction. The plate acquires an excess of positive charge (since electrons have left this once A metal ball (C)charged with static electricity can be lowered into the pail on a nonconducting silk thread. Electrons are essentially being transferred from the balloon to the sweater. Sticky Tape Experiments Lab Included, labeled and organized all parts of the lab report. 4 Reflect on your answer to #2, write down how your thinking has changed. Have a class Are you in need of an additional source of income? Record your observations. 2. has been fossilized). The metal plate does not pick up this positive charge, even though it rests on the lucite. ScenarioMandy took a trip to Rome, Italy. Charge the electrophorus lucite plate by rubbing it with silk. Touch the pith balls with the lucite rod. Lab 1 - Electrostatics To investigate the electrostatic interaction between various objects. User. Login projectile motion refers to design and light. The flow of direct current in a circuit is only possible when the circuit is closed, however, if the circuit is open, the flow of current stops. Does anything need to be held constant? electricity occurs whenever you have an accumulation of one type of charge. other and unlike charges attract each other. Performing experiments and writing lab reports provide hands-on experiences with engineering concepts and devices. Open phet.colorado/sims/html/balloons-and-static-electricity/latest/balloons-and- A whipping motion toward the end of the rubbing may help. To understand the response of the electroscope when a charged rod is brought near, so that the electrical charges on the rod interact with charges already present in the electroscope. This can happen when two non-conducting materials are rubbed together for example plastic and fur. gaining electrons now has more electrons and becomes negative. The hanging ball should be at the same height as the sliding ball (i.e., the top of the mirrored scale should pass behind the center of the hanging pith ball, as in Figure 12 below). KCL states that the current entering a node is equal to the current leaving it. However, it is known that the making and breaking of contact between the two materials transfers the charge. To conduct this experiment, I first filled him up with a lot of negative charges. Touch the pith balls with your finger to discharge them. Remove the sliding ball, and recheck the equilibrium position of the inside edge of the hanging ball. USW00094728 After that, I then made him touch the doorknob and all of the negative charges followed through the door. a. neutral region) and the support/needle acquires an excess of negative charge (since electrons Definitely a returning customer. For this experiment, I got the negative charges from the sweater for both balloons. d. How would the arrows look if the puck was negative? She was aware, though, that almost all of Italy's electricity was generated by burning fossil fuels, and thus she was determined after this to use the portable solar charger she had bought rather than wall electricity. I have already completed the abstract, procedure, data and collections, but I have a hard time putting everything together and for the discussion, I only talked about what electrostatic force is and how electrons protons neutrons make up all matter and how when two different objects are rubbed together, electrons are transferred from one . discussion. As shown in the demo below, the sweater is positive and the balloon attaches to the sweater due to the rubbing and the balloon essentially attracts to the electrons. Later, other materials were found which exhibited this same behavior. b. Direct current is a type of current that flows only in one direction. Electric charge comes in two forms: positive and negative. Access over 20 million homework documents through the notebank, Get on-demand Q&A homework help from verified tutors, Read 1000s of rich book guides covering popular titles. GOAL: (briefly state what experiment(s) will be performed and with what purpose). Electrostatics - 1 Electrostatics PES 216 Report Objective (up to you this time) The purpose of this lab was to investigate the nature of electric charge: how different materials obtain different charges, how like and opposite charges react with one another, . This force decreases as the distance between the charges Astronomy Lab due. There were four unknown solutes A, B and C. Each had a specific weight and was dissolved in a certain amount of solute to form either the covalent or ionic solution. 3. Students also viewed Bio 111 exam 1 study guide Laser Beam Lab - Lab Report Statistics Practice Lab This lab can be done with different materials found at home. One of these is silver. The electrophorus is a simple electrostatic induction device invented by Alessandro Volta around 1770. measurements. Discussion, Results and Conclusion Conclusion This lab aimed to show the effects of electrostatic forces between different charged objects. For a Observe and record what happens to the balls. attachment_1. The charges tend to accumulate on the surface of the balloons. Cross), Forecasting, Time Series, and Regression (Richard T. O'Connell; Anne B. Koehler), Biological Science (Freeman Scott; Quillin Kim; Allison Lizabeth), Chemistry: The Central Science (Theodore E. Brown; H. Eugene H LeMay; Bruce E. 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Collect data by turning on Values & drag in the Tape Measure like in this. The current should be read on the 300 mA (or lower) scale. This experiment was divided in four steps to find the electrical conductivity of covalent and ionic solutions. The positive charges on the wall will move towards the balloon, while the negative charges will repel against each other. illustrates the direction of the field in a positive and negative char. Number of : an American History (Eric Foner), Business Law: Text and Cases (Kenneth W. Clarkson; Roger LeRoy Miller; Frank B. Touch the lucite rod to the top of the electroscope. You can change the charge on the sliding ball by factors of two, by touching it to the other uncharged sliding ball (ground it with your finger first). (transfer of charge, induction, attraction, repulsion, and grounding). Question 1: When the balloon is rubbed on the sweater, what might happen? What do you predict for the answer? (The purpose of the closed box is to minimize the effects of air currents. The charged particles which make up the universe come in three kinds: positive, negative, and neutral. Then we will utilize two classic electrostatic devices the electrophorus and the Lynn University. In an insulator (a material If not then add a title. balloon. What is the exponent of the \(r\)-dependence of the force? An electroscope is a simple instrument to detect the presence of electric charge. The experiment that was conducted to prove my theory started by getting all the negative charges from the sweater then putting it up against the wall once it was filled with the negative charges. . because it contains an equal number of positive and negative charges. Charge the metal plate of the electrophorus in the usual way by rubbing the plastic base with silk, placing the metal plate on the base, and touching it with your finger. Today we know that the source of this attraction is due to the presence of static electric charge. A. 438v+3. PHY 2. What happens? Copyright: Once landed and inside the terminal, she turned her cell phone back on, but it was not charged. if you use two of the same ones exactly opposite to each other, they would also cancel out and the puck would be stationary. Why or why not? around a charged body. The Essay on Formal lab report on ionic and covalent compounds. If the wire or path is subsequently disconnected, the conductor as a whole is left with a net positive charge. charge is produced because some electrons are transferred from one object to the other. It depicts how the gravitational attraction force for small objects is insignificant when compared to electrostatic charge. from the sweater then putting it up against the wall once it was filled with the negative charges. Turn down the variac and shut the power off. Opposite charges attract each other. CONCLUSION. B. (transfer of charge, induction, attraction, repulsion, and grounding). If the humidity is extremely low, as is often the case in Southern California, you will probably not escape the lab without a direct experience with electrostatics! Test your understanding: Without using the simulations, predict the answers to these questions, then use the simulation to check your ideas. This is an intro-level engineering lab report. separated (positive on one side, negative on the other). Put the sliding ball in, and make trial measurements of the inside edge of the sliding ball and the inside edge of the hanging ball. You will learn to detect the presence of electric charges and, at least semi-quantitatively, measure them. Subject. USW000 popular science journals, physics homework help. Include in the discussion the vocabulary: induction; compare with charge transfer and The keynote speech delivered by Carl Sagan played a big r Our tutors provide high quality explanations & answers. B. Electric charge comes in two forms: positive and negative. Practice taking measurements and compare your readings with those of your lab partner until you are sure you can do them accurately. An earlier FBI conclusion agreed with the lab origin theory with "moderate confidence," but other U.S. government agencies - as well as DoE itself - previously concluded there isn't enough information . 10 Lab 1: Electrostatics Vanderbilt University, Dept. pulling or pushing. The purpose of this lab was to understand the idea of electrostatics AKA static electricity, and how electric charges interact with one another. Write how the results of your Reflect on your answer to #5, write down how your thinking has changed. Have a class 12 Test Bank - Gould's Ch. Hi, I need somehelp with General Chemistry class question. If this is the case, you can try again next week. As a result, like charges repel each Volume 1 covers mechanics, sound, oscillations, and waves. much stronger repulsion than when the non-sticky sides face each other. Provide details on what you need help with along with a budget and time limit. Your body thus acts as an electrical ground. The presence of the negatively charged balloon above the plate of the electroscope will induce the movement of electrons from the plate of the electroscope to the support and needle of the electroscope. The side which the tape faces matters. attachment_2. Bring up John Travoltage. In a metal, a charge can move freely and stay on the surface. 1. 2. Electric field lines are typically drawn to visualize the field. Copyright 2023 StudeerSnel B.V., Keizersgracht 424, 1016 GC Amsterdam, KVK: 56829787, BTW: NL852321363B01, Educational Research: Competencies for Analysis and Applications (Gay L. R.; Mills Geoffrey E.; Airasian Peter W.), Campbell Biology (Jane B. Reece; Lisa A. Urry; Michael L. Cain; Steven A. Wasserman; Peter V. Minorsky), Psychology (David G. Myers; C. Nathan DeWall), The Methodology of the Social Sciences (Max Weber), Principles of Environmental Science (William P. Cunningham; Mary Ann Cunningham), Brunner and Suddarth's Textbook of Medical-Surgical Nursing (Janice L. Hinkle; Kerry H. Cheever), Civilization and its Discontents (Sigmund Freud), Give Me Liberty! Therefore, to demonstrate the inverse \(r\)-squared dependence of Coulomb's Law, we need to measure the displacement as a function of the separation between the centers of the balls. Write what you think is happening. Follow Because the positive charge is not used up, the metal plate can be charged repeatedly by induction. Step 3: Add an extra bulb into the circuit loop. Use a little whipping motion at the end of the rubbing. Critique the lab and describe opportunities for further / future work. field with the positive puck. the negative charge to pull the positive puck. Lab Report #2 for the Electric Circuits 1 course. PURPOSE OF THIS ASSIGNMENT: To improve your scientific literacy and critical thinking What happens? Say Discuss Data section includes the provided table; observations are reasonably accurate and the conclusions regarding the charge are consistent with the observations. Once the What should you plot against what? (Theoretically, it should be 2.000, but what does your curve fit produce?). Title / Cover Sheet: use the provided cover sheet. Take measurements, and record the diameter of the balls (by sighting on the scale). Hold one end of the neon tube with your fingers, and bring the metal plate slowly closer to the other end. The polarization of charge in the insulator is small, but now its positive charge is a bit closer to the negative rod, and its negative charge is a bit farther away. Experiment Title: Chemical Equilibrium and Le Chateliers Principle. Conclusion/Discussion About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . USW00094728 USW00094728 Although the wall should normally have a neutral charge, the charges within it can rearrange so that a positively charged area attracts the negatively charged balloon. SCI 1015 Week 3 Life Science and Protein Synthesis Cellular Breakdown Discussion, CHEM 011531 SFSU Effect of Bond Order and Resonance on Bond Lengths Lab Report. i. is placed inside a strong electric field, the material may become polarized. Plot (by hand or with Excel) \(d\) versus \(1/r^2\). Surrounding a charge there is an invisible electric field which gets weaker the farther away Lift off the metal plate by its insulating handle, and touch it carefully to the ball on the left sliding block. If the angle \(\phi\) is small, then \(\tan\phi = \sin\phi\), and \(d\) is proportional to \(F\). If they are charged differently, they show attraction. Below are 5 core components of a good conclusion for any scientific lab report: Restate the Experiment's Goals. contrast to the one from the negative charge? Students also viewed Physics 2 lab report Coulomb's Law Ohm's law - Lab report Figure 2 shows a Van de Graaff generator on the left and also shows some of the equipment that will be used with it during the lab. Your matched tutor provides personalized help according to your question details. So the balloons did move away from each other. How does the arrow from the positive charge compare and Negative charge on the sweater will move on to the balloon. same between the two charges. If high-humidity conditions prevent you from completing certain parts, you may try them again next week with the Van de Graaff experiments. Using Coulombs law, we can explore the effect of the distance, between two charged particles, on the force between them. The general conclusion is that there are two kinds of charge, which are in some way opposite. If necessary, adjust carefully the fine threads that hold the hanging ball to position it properly. Distribution of charges in a polarized and non-polarized object. Placeq 1 andq 2 4cmapart. Recharge the metal plate, and actually touch it to the top of the electroscope. same rule applies that similar charges will repel each other and opposite charges different fabrics, such as cotton, silk and wool. In this section, you will observe the characteristics of the two types of charges, and verify experimentally that opposite charges attract and like charges repel. discussion. Write observations with drawings of SE2. These are the countries currently available for verification, with more to come! Slide the block into the Coulomb apparatus without touching the sides of the box with the ball. The influence of insulators and conductors was also observed during the experiment as well as ways to charge static electric charges. Essay Example on Electrical Conductivity Lab. Recharge the sliding ball so it produces the maximum force, and experiment with pushing it toward the hanging ball. This way, you can obtain charges on the first ball of \(Q\), \(Q/2\), \(Q/4\), and so forth. However, if a neutral object This new feature enables different reading modes for our document viewer. Therefore the balloon material ends up with an excess of electrons and becomes negatively charged, while the other (sweater) ends up with a deficiency of electrons and becomes positively charged. number of positive and negative charges (thus an equal number of protons and electrons). and protons carry positive charge. Consequently, when you rub a balloon on wool, this causes the electrons to move from the wool to the balloon's surface. Provide another example from your own experience, compare, and contrast your scenario to the provided scenario below. Charge one lucite rod by rubbing it vigorously with silk. Inside a polarized material, positive and negative charges are no longer randomly distributed and are slightly separated (positive on one side, negative on the other). Electrical circuits are described with mathematical expressions. several objects found around the home made of wood, glass plastic and rubber The little yellow E field sensors are like the Include in the discussion the vocabulary: charge transfer and electric attraction. the positive charge would pull Objects of the same electric charge repel, and objects of opposite charges attract. Hard rubber rods, which are also commonly used, become negatively charged. Make sure that they understand that this is commonly called grounding. discussion. Observe what happens with the neon tube. The excess amount of negative charge in his body will go through the doorknob as he touches it. (phet.colorado/en/simulation/john-travoltage). Record and explain your results. is Capacitors And Electrostatics Lab Report Conclusion below. Insert your data table and graph from your spreadsheet. 1. Include in the discussion the vocabulary: charge transfer and electric attraction. This experiment consists of many short demonstrations in electrostatics. Abstract: This lab focuses on Newton's second law and Coulomb's law. Now if we connect a conducting wire or any other conducting material from the polarized conductor to the ground, we provide a path through which the electrons can move. will attract each other. slightly electrocuted. Not all steps have observations to record. This laboratory activity provides the opportunity to investigate the concepts of static electricity, electrical force, charge, and polarization. Inside a polarized Their electrons are bound tightly and cannot move. In order for the balloon to stick to the wall you need to have rubbed the balloon on the sweater so that it is able to collect electrons, then once you place the balloon near the wall it will stay on it. It is pretty easy basic calculations, Electricity, Magnetism, and Light Compare/Contrast Paper. Fold one end to use as a handle.
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