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To determine e/m of an electron experimentally

Extracts from this document...

Introduction

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Tare-sang Nam

Physics 102                        11/26/02

         Physics Lab

Determination of e/m of an Electron

1. Purpose

        To determine e/m of an electron experimentally

2. Procedure

        Prepare an electron-accelerator. Place it between Helmholts Coils, which produces a uniform magnetic field. The electron-accelerator creates a potential difference, v, which speeds up a negatively charged electron to image00.png.

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Middle

182

0.057

0.0032

150

0.053

0.0028

129

0.060

0.0036

170

4. Mathematical Formulas and Equations

                                        where v = the voltage that accelerates electrons                                                                                      a = the radius of the coilsimage01.png

                                                  N = the number of turns on each coil

                                                   μ = 4π*10-7

                                                    I = the current through the coils

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Conclusion

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