Physics307L:People/Knockel/Notebook/070912: Difference between revisions
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*'''d=0.00759 m''' (plastic spacer width using micrometer) | *'''d=0.00759 m''' (plastic spacer width using micrometer) | ||
*'''<math>\rho=886 kg/m^3 | *'''<math>\rho</math>=886 kg/m^3''' (density of oil given on bottle) | ||
*'''g=9.8 m/s^2''' (gravitational acceleration) | *'''g=9.8 m/s^2''' (gravitational acceleration) | ||
*'''p=8.5x10^4 Pa''' (air pressure in Albuquerque) | *'''p=8.5x10^4 Pa''' (air pressure in Albuquerque) | ||
*'''b=8.20x10^-3 Pa*m''' (some stupid constant) | *'''b=8.20x10^-3 Pa*m''' (some stupid constant) |
Revision as of 12:17, 15 September 2007
Millikan's oil drop experiment (charge of the electron)
Goal
I want to measure the charge of an electron by measuring the charge on a bunch of oil droplets and seeing if I can find that my calculated charges are integer multiples of some fundamental charge. The actual value is [math]\displaystyle{ e=1.60\times10^{-19} C }[/math].
Equipment
- power source
- atomizer (to spray oil droplets)
- 2 multimeters
- banana cords
- banana plug patch cords
- THE MILLIKAN DEVICE! (scope, viewing chamber, light, level, focusing wire, thermistor, etc.)
- DC transformer for light
- micrometer
Setup
- plug in power supply to wall and Millikan device (turned off)
- hook up multimeter using banana plug patch cords to check voltage from power supply
- level the Millikan device
- plug in the light using DC transformer
- focus viewing scope with focusing wire
- aim the lamp/light/filament
- turn on power supply and check it's voltage using first multimeter
- attach another multimeter to the thermistor
Measurements and values
- d=0.00759 m (plastic spacer width using micrometer)
- [math]\displaystyle{ \rho }[/math]=886 kg/m^3 (density of oil given on bottle)
- g=9.8 m/s^2 (gravitational acceleration)
- p=8.5x10^4 Pa (air pressure in Albuquerque)
- b=8.20x10^-3 Pa*m (some stupid constant)