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Experiment 8: Magnetic Field in a Current Carrying CoilSavannah DavisPHYS 1440 SEC: 50311-11-2020
Magnetic Field in a Current Carrying CoilSavannah Davis*Physics Laboratory, Department of Physics, University of North Texas, 1155 Union Circle, #311427, Denton, Texas 7620311 November 2020AbstractThe objective of this experiment is to compare changes in the axial andradial magnetic field as the position of a magnetic field sensor is movedthrough a current carrying coil. This will be achieved by comparing themeasured values with those obtained by the long and short solenoidequations. It was determined that the current carrying coil in thisexperiment is most likely a short solenoid as the measured value wasclosest to the calculated short equation. It is important to determine thetype of coil in order to better understand the axial and radial componentsand the magnetic field as a whole. This understanding can be applied toeveryday uses of magnetic fields, such as compasses and electric motors,in order to improve efficiency and usage.IntroductionElectron under potential difference in a wire cause current to flow. Current flow is associated withmoving charges that in turn create a magnetic field. Magnetic field can be recorded in two components,axial and radial. The below figure shows how a magnetic field moves through a solenoid, the field linetravel from the bottom to the top always flowing from north to south. The following equation is used to determine the magnetic field along the perpendicular axis through thecenter of a short solenoid. N is the number of turns, μ0is the permittivity of free space, R is the
radius of the coil, I is the current through the coil and x is the distance from the center of the coil. To use