However according to our data we found that magnetic

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discounted by subsequent testing. However, according to our data, we found that magnetic field strength increases fairly rapidly to a plateau and falls off equally rapidly on the opposite side. This is true for both the transverse and longitudinal axes. In addition, we find that this homogeneous region is fairly 10
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large for the Helmholtz coil case. Using our data, and finding the region in which our data has a magnetic field strength of +/- 5along the transverse axis, where 0 is defined as the geometric center of the configuration. Taking a rough estimate of this volume as a cylinder, we find then that the magnetic field may be considered uniform for a volume of π * (3 . 25) 2 * 5 . 5 cm 3 or 182 . 5 cm 3 . Reexpressing the radius as a proportion of the radius of the coil, and the height as a proportion of the coil separation, we find 3.25/5.88R and 5.5/8.5 h, making the volume 0 . 197 * V 0 where V 0 is the volume enclosed by the setup. Additionally, we performed an analysis on the relative waveforms of the induced emf to the input current. By the scale of the grid in the oscilloscope, the waveforms had similar periods, approximately 4 x-units, but the induced emf had a waveform that was offset by 1 x-unit, reinforcing our intuition that the induced emf should be 90 degrees out of sync. In addition, looking at the Lissajous figure, we see a axis-oriented ellipse, with a major-axis twice as long as the minor-axis. Because it is axis-oriented, this Lissajous figure indicates
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  • Winter '13
  • MarceloGleiser
  • Physics, Magnetic Field, ε, magnetic field strength, Magnetic Field Mapping

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