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Magnetic Field Mapping andElectromagnetic InductionPhy 216-06Group 1Destiny Ball, Ajahni Franklin,Amanda Harvey, Andre Roots, Dylan Scott, 02/12/19Title Page & Format _____(10 pt max)Purpose & Introduction _____(10 pt maxExperimental Details _____(10 pt max)Results and Discussion _____(50 pt max)Conclusion _____(15 pt max)References _____(5 pt max)Total Grade ________
Section 1: Purpose and Introduction The purpose of the experiment was to use the relationship between changing magneticfield and current to map a magnetic field between two magnetics and analyze electromagneticinduction. The main physics concepts in this experiment were the properties of magnets, withsouth and north poles, and current produced by the changing magnetic fields. In this experimenttwo magnets and a compass were used to construct the mapping of the magnetic field. Thecompass was used to help plot the magnetic field lines because the needle in a compass shouldpoint in the direction of a magnetic north pole or along the north pole field lines. A magneticfield is the area around any magnet that exerts a force on any object inside the field. Eachmagnetic field has field lines that leave from the north pole and enter the south pole. A magnetcan be defined as an object that is composed of metals that show attractive and repulsive forcesto other metals of the same kind. The field lines were constructed on a piece of paper knowingthe fact that similar charges/poles repel and unlike charges/poles attack were constructed on apiece of paper. Changing magnetic fields produce changing electric fields which in turn maycreate a induced current . This occurrence is shown in the experiment and used as one of thefundamental parts of the process. The phenomenon can be explained by Faraday’s Law for achanging magnetic flux :ε=−N∆Φ∆t=−N(Φ−Φₒt−tₒ)=−N(BAcosθ−B Acosθₒt−tₒ¿(1)Whereεis the electromotive force from a changing electric field (emf) in volts, B is themagnetic field strength in Teslas, A is the area of the coil in meters squared, θis the anglebetween the surface normal of the coil and the magnetic field, ∆t is the change in time, N is thenumber of loops (windings) of the coil of wire. Section 2: Experimental DetailsIn this experiment a compass was used to map a magnetic field. Two coils were used intandem with a power supply and a bar magnet to determine the effects of a change in themagnetic field inside of the coils that induced current that was measured by a galvanometer. Tocomplete the mapping of the magnetic fields first the horseshoe magnetic and bar magnet wereplaced on different sides of the paper diagonally from each other. The presence of a magnetproduces a magnetic field so the field was mapped when combining the two magnets by use of acompass to draw directional lines at all key spots that were located: between the horseshoemagnet on the sides of the bar magnet, in the middle of the bar and horseshoe magnet and at thepoint where the north pole field lines meet and repel each other. The second part of thisexperiment was analyzing an induced current from a changing magnetic field. The large coil was