Using a Helmholtz coil, a calibration constant is determined that is applied to deflection values obtained by a ballistic galvanometer. A magnetic field exerts forces on a compass needle such that the needle tends to align itself with the direction of the field. Little did I realize that while I knew that these fields should look like theoretically, modelling them would have been a great undertaking. Magnetic fields can be represented by magnetic field lines. Conclusion Questions: A magnetic field is strongest where it ha the most lines of force. Do any of the lines of force sketched in Fig. Steady magnetic fields like those 4. The sphere could have been modeled in two different ways: as a rotating sphere of charge, or a collection of current-carrying loops. Lab 6: The Earth’s Magnetic Field 1 Introduction The earth just like other planetary bodies has a mag-netic fleld. Meiosis. I think the only thing that I would have done differently is to have still compared to Peter’s results, even though your project parameters changed. Then the dipole moment can be calculated from the slope of a plot of B vs. € 1/z3. The data followed the expected trend of increasing in magnetic field strength as the number of turns increased. Additionally, the wire was not perfectly wrapped around the base, which would throw the readings off as it would not have been an exact turn of the wire. 28 Magnetic Field in a Coil. If the magnetic field is strong enough and additional non-magnetic forces (gravity, etc.) DC electrical circuits, charged particle beams, and even the electrons circulating around a … Conclusion A current carrying wire placed in the magnetic field often experiences a force as a result of interactions between the moving charges and the magnetic field. 11.5 Magnetic Force on a Current-Carrying Conductor. Discuss your drawing with a TA. LABORATORY V MAGNETIC FIELDS AND FORCES Lab V - 1 Magnetism plays a large part in our modern world's technology. The purpose of the Magnetic Field in a Slinky lab is to determine the relationship between the magnetic field and the current in a solenoid, determine the relationship between the magnetic field and the number of turns per meter in a solenoid, study how the field varies inside and outside a solenoid, and determine the value of µ0 (the permeability constant). Conclusion. In this experiment we studied magnetic fields and learned how to predict the direction of the magnetic force on a moving charge. Discuss your results in the conclusion. At least that’s how I got the field outside the torus of my model to be zero (field1 was the torus, bCart2 was piece-wise defined as negative bCart1 or zero, depending on the location). Initial hypothesis: Magnetic field strength will be proportional to the strength of the current running through a straight wire and inversely proportional to the distance from the wire. The standard MKS unit for a magnetic field is Tesla. According to Faraday’s Law a change of the magnetic flux through an area bounded by closed circuit induces a voltage that drives the flow of current around the circuit. The purpose of this lab is to investigate magnetic fields around simple geometric configurations of wires carrying current. In the Hall effect, when an electric current is driven through a small piece of semiconductor in a magnetic field, a voltage appears perpendicular to … x = 100 mm. Magnetic Field Conclusions When I started this project I initially had the intention to model the magnetic fields due to a cylinder, bar magnet, and sphere. The white dot of the sensor was aligned to be in the center of the cylindrical support with the white dot facing upward. Magnets exert attractive or repulsive forces on each other. The velocity dependent component of the force on a moving charge is associated with the magnetic field. What is the percent difference? Magnetism also High magnetic field science and technology are thriving in the United States today, and the prospects are bright for future gains from high-field research. Finally, it was difficult to align the sensor perfectly in the middle of the support, so again this would contribute to some error in the readings. Magnetism also Determine which side of the compass (either blue or silver) points along the magnetic field lines. The magnetic field sensor was zeroed and the DC power supply was set to 7 A. 3. Diameter of Cylindrical support = 0.130 m. 1. Magnetic Field Strength (T) 1.75 1.50 1.25 1.00 0.75 0.50 0.25 Create a graph of B on the y-axis and (I x N)/(2π r) on the x-axis. Magnets are used today to image parts of the body, to explore the mysteries of the human brain, and to store data for computers. E. Use the "manual graph" file to plot a graph of B vs. x (magnetic field on the vertical axis. 98 Experiment 18: Earth’s Magnetic Field Advance Reading Text: Magnetic field, vectors, right-hand rule for a wire loop, resistivity. The direction of the magnetic field at the center of the circular loop can be obtained by applying the same right-hand rule as for a straight wire: Imagine grasping the wire in your right hand with your thumb in the direction of the current and then your fingers curl around the wire in the direction of the magnetic field. Data Table 4 Calculate your value of μoI / 2R. An electrical current produces a magnetic field around the wire. Physics E401 Magnetic Fields and Magnetic Force Analysis/Conclusion. Two charged particles travel with some velocity, , through a uniform magnetic field, .As the charges pass through the magnetic field, each experiences a magnetic force, , due to their velocity, the direction and strength of the magnetic field and their charge, .Note that here the positive charge experiences an upward magnetic force and the negative charge experiences a downward force. Disclosure: As an Amazon Associate I earn from qualifying purchases. To do this, use a magnetic compass to determine the direction of the Earth's field, mark its direction on your work station with paper tape, and record … The high amperage DC power supply was connected in series with a high power resistor and the aluminum wire at the side and on top of the apparatus. For example, using your names, if the field from one wire was “bCart1” and from the other was “bCart2”, defining “fieldtotal = bCart1 + bCart2” and then using Vectorplot with fieldtotal as the argument should do the trick, I think. For your data from Part 1, plot a graph in Graphical Analysis of B vs. 1/R. Fig. In the Magnetic Field Sensor’s setup window, set the Gain to 10x and, under the Lab Report 5 Magnetic Fields Physics 262-003 Author: A. Coughran Lab Partners: E. Ortiz, H. Barham Date: 4/12/17 Lab Report 5 A. Coughran 4/12/17 Objective: The objective in Lab 5 is to measure and determine the strength and location of magnetic fields using a coil, solenoid, and magnets. My understanding of how Mathematica functions as a program has grown and I have come to appreciate its capabilities. Experiment on relationship between magnetic field and current in a Slinky Abstract A current carrying conductor possesses an associated magnetic field around it in accordance to the Biot-Savart law. Psst: If you find my website helpful or enjoyable, please join my newsletter and/or send me an email—I want to hear from you! 1, 2, 3 or 4 cross each other? The resulting slope was 9.2 x 10-7 Tm and the correlation was 0.9734. Next I decided I would use the same method that I used to mimic a plane of current and attempt to model a magnetic dipole. Fig. Possible error could have resulted from the earth’s magnetic field. The exact dependence of the magnetic field strength B on the number of turns N is B = NμoI/ 2R where R is the radius of the loop of wire. Conclusion. The data followed the expected trend of decreasing in magnetic field strength as the radius increased. Graphical Analysis was used to plot B vs. 1/R and perform a linear trend. The field then gets measured off- center to discover if the field remains uniform within a radial direction. 2. The magnetic eld is our way of describing the condition of space around a bar magnet or around any moving charge, such as the moving charges in a current. are negligible, then the compass needle points for all practical purposes in the direction of the field. Print out a graph for your report. While this would have made my model look nicer, it is still relatively clear to understand how the field lines add together. through a wire, a magnetic field is produced in the region around the wire. Lab Report#1 Pcs130 magnetic field - Free download as Word Doc (.doc), PDF File (.pdf), Text File (.txt) or read online for free. What is the percent difference? During part one of the experiment, magnetic field strength was measured as a function of radial distance from a conductor. The diameter of the cylindrical support was also measured, being 0.013 m. Graphical Analysis was used to plot B vs N and perform a linear trend. Physics 15b Lab 3: Magnetic Fields and Induction In Chapter 5, Purcell uses relativity to derive the force acting between two moving charges, given the forces and charge densities in a stationary frame. The magnetic field strength was recorded using Vernier Lab Pro. 2. Your presentation both in class and on the blog were organized and clear, and your Mathematica file was sufficiently clear and explained. Magnetic Field Lab. The measure- Why do right and left radial magnetic fields look the way they do? A wire carrying electric current I in a magnetic field B will be subject to a force Which theoretical model (single coil or long coil) explains the magnetic field of short coil (used in this experiment)? Record the magnetic field at each position. First, the power supply was turned off and the center aluminum wire was removed along with the top table of the tangential galvanometer. The Hall effect will be used to find this field. The intensity of a magnetic field gets measured from three separate coil spacings, where each distance creates its own magnetic field. Obtain a compass. During part two of the experiment, magnetic field strength was measured as a function of the number of turns in a wire. Where is the field strongest around the magnet? EXPERIMENT 10: MAGNETIC FIELDS Introduction: In this lab, you will use compasses and iron lings to investigate the magnetic eld of a bar magnet and the magnetic eld of a long straight current. 26771032 Matriculation Physics Magnetic Field. The magnetic field is the only field where the lines of force that show the direction of the field can be made visible. Laboratory #6 Magnetic Fields Objective This experiment has 2 parts: (1) you will map the magnetic fields around a bar magnet and a current-carrying coil, and (2) you will measure induced currents using a bar magnet and a galvinometer. 2. Ronaldo Degazon Friday 31/01/12 Physics Lab #17 Discussion: A magnetic field is the region or space around a magnet where the effects of the magnet can be experienced by any magnetic material. The data collected correlated strongly to the hypotheses, albeit with percent errors reaching as high as 20% [uncalibrated]. The value is 1.4 x10-6 Tm, which is larger in value in comparison to the slope. Magnetic fields effect the alignment of electrons in an atom, and can cause force to develop across space. 7.2 Introduction Note: For this experiment, you will write a complete (formal) lab report and hand it in at the next meeting of your lab section. In physics, a magnetic field is represented by the letter “B”. During part one of the experiment, magnetic field strength was measured as a function of radial distance from a conductor. First, a piece of polar graph paper with concentric circles starting at a diameter of 0.5 cm increasing in increments of 0.5 cm to 10 cm was punched through a rigid aluminum conductor at the center of the concentric circles. 1. Conclusion The purpose of the experiment was to study and analyze magnetic fields, forces and Faraday’s Laws. To do this, use a magnetic compass to determine the direction of the Earth's field, mark its direction on your work station with paper tape, and record … Place a bar magnet on a piece of white paper or graph paper. 1. This value was recorded along with the respective radius. To measure and determine the relationship between a magnetic field generated by a line of current and a radial distance from a conductor, and to measure and determine the relationship between a magnetic field at the center of a coil and the number of turns in a coil. The plot below was all that I had to work with. Magnetic field of a straight wire. However, I suspect that if I found a function Mathematica that would do this for me, I would have indeed modeled a magnetic dipole. In the visual on the left you can see a surface covered with iron filings. The paper was placed on the plastic table of the apparatus and was aligned using a compass so that the parallel lines on the sheet were pointing north. the lab is about measuring the magnetic field created by the current running through the coil using vernier and logger pro. For your data from Part 2, plot a graph in Graphical Analysis of B vs. N. Your graph should have a linear trend. 2. Thanks! This experiment is all about magnets, wherein it revolves on two principles of magnetisms which are the magnetic fields and the magnetic force. The percent difference is 2.6%. Orient the Helmholtz coils (HC) so as to eliminate the influence of the Earth's magnetic field on the experiment. The magnetic eld is our way of describing the condition of space around a bar magnet or around any moving charge, such as the moving charges in a current. I also learned that while something may seem simple at first in theory, it can be very complicated to achieve in reality. A great example of Lenz’s law is to take a copper tube (it’s conductive but non-magnetic) and drop a piece of steel down through the tube. Orient the Helmholtz coils (HC) so as to eliminate the influence of the Earth's magnetic field on the experiment. What is the value of the slope? I also think you did a good job of talking about the implications of your model – specifically how the system of several wires could be expanded to approximate a plane of current. 2. Magnetic fields are produced by the motion of electrical charges (see the next unit on electromagnetism). As the number of turns in the coil increases, the magnetic field strength will increase, in accordance with the equation B = NμoI / 2R. 4, the field at the center point between the coils will be nearly homogeneous.1 H. von Helmholtz (1821-1894) realized that there 1 The symmetry of the arrangement makes the first derivative of the field with respect to the axial direction vanish. The field is much stronger inside the loop than at points outside it. High magnetic field science is having an important impact in many disciplines, including medicine, chemistry, and condensed-matter physics. ↘︎ Mar 29, 2010 … 4′ … download⇠ | skip ⇢. QUESTIONS: 1. The purpose of this lab is to explore the relationship among force exerted on a current-carrying wire, magnetic field strength, and the length of the wire. magnetic field at the center of a circular coil of wire (B c in Fig. The magnetic field sensor was inserted into the side of the cylindrical support by screwing it into the side of the top table support using a threaded plastic bushing. The resulting slope was 6.53 x 10-5 T/turn and the correlation was 0.9943. Magnetic Field Conclusions When I started this project I initially had the intention to model the magnetic fields due to a cylinder, bar magnet, and sphere. To measure the magnitude and approximate orientation of the Earth’s magnetic field in classroom. and click on “Compute Magnetic Field Components.” Report the value of i in Table 3. The magnitude of this magnetic field is dependent on current through the conductor which in turn is dependent on the potential difference supplied and the resistance […] Theory The magnetic field of Earth resembles the field of a bar magnet. One gauss is equal to 1 x 10-4 Tesla. This is simply the induction process. In the last part of the experiment the magnetic field of a standard bar magnetic will be measured. Homework The horizontal component of the Earth's magnetic field, B h Objective The objective of this lab is to measure the magnitude of Earth’s magnetic field in the lab. A Tesla is 1N/amp*m. Magnetic fields can also be measured using the unit of gauss. You will draw field lines and analyze their meaning. ADAM CAP is an elastic waistband enthusiast, hammock admirer, and rare dingus collector hailing from Berwyn, Pennsylvania. The magnetic field sensor measured B using “Events with Entry” on Lab Pro. PHYS 1493/1494/2699: Exp. Lab 5 - Magnetic Force 1. INTRODUCTION In these exercises, you will study the magnetic field of bar magnets and the earth. The conclusion is that the magnetic field is essentially uniform inside of the coil and fringes like a magnetic dipole outside of the coil. All magnetic fields arise from the motion of electric charges. 3. The directionality of the magnetic field produced is determined by the right hand rule-2, where your thumb points in the direction of the current and your fingers wrap around the wire in the direction of the magnetic field. If the magnetic field is strong enough and additional non-magnetic forces (gravity, etc.) Magnetic flux can be thought of as the number of magnetic field lines passing through a given area. 3. Steady magnetic fields like those we will study in this experiment are created by steady currents of charged particles. show that if identical current-carrying wires were aligned next to each other, their resulting magnetic field would resemble that of the field due to a plane of current as the distance between them decreases. Perform a Linear Fit on your graph. It was somewhat difficult to get accurate readings at the smaller radii, which negatively affected this correlation. After some discussion with Professor Magnes, I decided I would take what I had, and make more complicated systems with it. In class you calculated the magnetic field along the axis of a coil to be given by: 2 0 223/2 1 axial 2() NIR B zR µ = + where z is measured from the center of the coil. Equipment: 1 wire stand 6-9 small compasses 1 power supply 1 3-dimensional compass Exploration 2: The magnetic field of a current-carrying wire Exploration 2.1 The Earth’s magnetic field Lab Report#1 Pcs130 magnetic field. The slope from this plot in comparison to the value of μoI / 2R, 6.7 x 10-5 T/turn, yielded a percent difference of only 2.6%. Calculate your value of μoI / 2π. Again I was faced with the issue of superimposing my two vector fields. The value is 6.7 x 10-5 T/turn, which is very similar yet slightly large in value than the slope. The magnetic field strength was measured for six full turns of the wire. Highlight “H(orizontal Intensity)”, and click on “Compute Magnetic Field Components.” Report the value of … The purpose of this lab is to investigate magnetic fields around simple geometric configurations of wires carrying current. I would then plot their resulting vector fields and change the viewpoint such that only the x,y plane was seen. In this lab we will have a disk magnet (a dipole) suspended on a spring, which we will use to observe forces on dipoles due to different magnetic field configurations. 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