User:Jared A. Booth/Notebook/Physics 307L/2009/09/21
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Milikan Oil Drop
The purpose of this lab is to attempt to measure the electric charge of an electron in the same manner as Milikan.
PASCO scientific model AP-8210 Milikan Oil Drop Apparatus
A high voltage power source (~500V DC) will be used, so it is essential to check all equipment for damage.
The procedure was followed according to the manual included with the PASCO Apparatus.
Width of plastic spacer: Using a calibrated micrometer, d=5.60mm with uncertainty +/- 0.01mm
Voltage applied to apparatus: 499.0V DC
Thermistor Resistance: 2.070 kohm
Temperature from Table: 24.55°C
All fall and rise times were calculated as the droplet covered a distance of .5mm
Rise time in seconds: 8.59
Rise time in seconds: 16.83, 18.62
Rise time in seconds: 5.74, 2.79, 2.58, 2.72
Rise time in seconds: 5.03, 3.14, 3.00, 3.14, 3.00
Rise time in seconds: 4.47, 4.33, 4.40, 4.33, 4.40
Rise time in seconds: 7.75, 7.13, 8.10, 8.31, 8.31
Calculating the charge on the droplets
Using the equation derived in the introduction of the manual for the PASCO apparatus and the rise and fall times measured, we can now calculate the charge on each droplet.
Erica Colon for assistance in recording data.