Physics307L:People/Klimov/Eoverm: Difference between revisions
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=e/m Ratio Lab Summary= | =e/m Ratio Lab Summary= | ||
In this lab, the e/m ratio of the electron was measured. We did this by accelerating electrons into a uniform magnetic field produced by Helmholtz coils. Because moving charges feel a force in a magnetic field, the electrons started to rotate in the field. From the Lorentz force law, it is easy to calculate the e/m ratio using only the accelerating voltage, the current flowing through the coils, and the radius of the rotating beam. | In this lab, the e/m ratio of the electron was measured. We did this by accelerating electrons into a uniform magnetic field produced by Helmholtz coils. Because moving charges feel a force in a magnetic field, the electrons started to rotate in the field. From the Lorentz force law, it is easy to calculate the e/m ratio using only the accelerating voltage, the current flowing through the coils, and the radius of the rotating beam. | ||
'''Important Links''': | |||
*[[User:Paul_V_Klimov/Notebook/JuniorLab307L/2008/09/15#Lab_2:_The_Ratio_e.2Fm_for_Electrons|Lab Notebook]] | |||
*[[User:Paul_V_Klimov/Notebook/JuniorLab307L/2008/09/15#Data | Data]] | |||
*[[User:Paul_V_Klimov/Notebook/JuniorLab307L/2008/09/15#Post_Experimental_Data_Analysis|Post Experimental Data Analysis]] | |||
*[[User:Paul_V_Klimov/Notebook/JuniorLab307L/2008/09/15#Lab_Manual_Questions|Lab Manual Questions]] | |||
Revision as of 17:09, 28 September 2008
e/m Ratio Lab Summary
In this lab, the e/m ratio of the electron was measured. We did this by accelerating electrons into a uniform magnetic field produced by Helmholtz coils. Because moving charges feel a force in a magnetic field, the electrons started to rotate in the field. From the Lorentz force law, it is easy to calculate the e/m ratio using only the accelerating voltage, the current flowing through the coils, and the radius of the rotating beam.
Important Links:
References
1. Helium. Used to find ionization energy. Given in kJ/mol, and then converted.
2. NOAA. Used to find the earth's magnetic field in Albuquerque.
