5304 Apparatus for the measurement of the e/m ratio
The main part cosists of a hot cathode Thomson’s tube, whose filament must be fed with a voltage of 6,3V ac and whose anode must be fed with a voltage of 1500-5000 V dc. The beam of electrons produced is deflected by an electric field produced by a generator of medium voltage and by magnetic field created by two Helmholtz reels. The measure of the electron specific charge can be determined with a percent mistake of 5% .
For the power supply of the apparatus, it is necessary to purchase the following (or similar) generators cod. 5292 e 5324.
Topics
• Nature of the cathode rays
• Electric and magnetic deflection
• Evaluation of the ratio e/m with a grom percentage less than 5%
