User:Jacob R Jaramillo/Notebook/E/M

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Safety

 * As always when dealing with electricity, be care not to touch any exposed metal on the banana clips when plugging in connections and when removing connections.


 * Use caution when handling the bulb as not only is it an expensive piece of equipment, it can shatter and cut you.


 * Be careful not to exceed the maximum voltage load of 6.3 volts to the heater.

Equipment

 * HP DC Power Supply, Model 6384A


 * SOAR DC Power Supply, Model 7403


 * Gelman Power Supply


 * BK Precision Digital Multimeter, Model 2831B


 * e/m Experimental Apparatus, Model TG-13

Procedure
The following experiment was conducted via | Professor Gold's manual

A summary of the procedure is:


 * Connect 6-9V DC supply at 2A to the Helmholtz coil jacks


 * Connect ammeter in series to measure current


 * Connect 6.3 volts (do NOT exceed 6.3 volts) rated at 1.5A to the heater jacks


 * Lastly connect HV source (150-300V DC) rated at 40mA to the electrode jacks of the electron gun.

Results


| 1/R vs Current



Conclusions
Although my error wasn't extremely significant, some reasons for error that I came up with are:


 * Reading the actual radius with the naked eye


 * The gas ratio in the tube


 * Sensitivity of the voltage and current meters

Summary
E/M Summary