em of Electron

em of Electron - Determination of e/m for the Electron...

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Determination of e/m for the Electron Section 422, B.J. Anderson Stephen Harper Partner: Sarah Bass Tuesday, October 4, 2005 “The work presented in this report is my own, and the data were obtained by my lab partners and myself during the lab period.”
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Abstract: The purpose of this experiment was to measure the e/m ratio of an electron. A DC power supply connected to a multimeter, Helmholtz coils, and voltmeter was used in this experiment. The current was measured at distances of 2.00, 1.75, 1.50, 1.25, and 1.00 cm of the diameter of the electron beam. The e/m ratio was calculated at both low voltage and high voltages which was 1.35E11 ± 0.09 C/kg and 1.61E11 ± 0.09 C/kg, respectively. A weighted average was then found to be 1.48E11 ± 0.06 C/kg. This value does not agree with the accepted value of 1.76E11 C/kg within uncertainties. This implies that most likely a mistake was made in the measuring of the diameter. Data Analysis and Results:
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This note was uploaded on 11/27/2011 for the course PHYS 105 taught by Professor Walker during the Fall '08 term at UNC.

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em of Electron - Determination of e/m for the Electron...

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