User:Jared A. Booth/Notebook/Physics 307L/2009/09/21: Difference between revisions
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Fall time: 19.21, 22.36, 20.89, 19.87, 25.78<br><br> | Fall time: 19.21, 22.36, 20.89, 19.87, 25.78<br><br> | ||
Since the fall time is independent of charge, and the addition or subtraction of several electrons will have a negligible effect on the mass, it is likely safe to assume the average fall time of the droplet is the same both before and after ionization. Therefore, it would be appropriate to take the average over all measured fall times for droplet 6. | Since the fall time is independent of charge, and the addition or subtraction of several electrons will have a negligible effect on the mass, it is likely safe to assume the average fall time of the droplet is the same both before and after ionization. Therefore, it would be appropriate to take the average over all measured fall times for droplet 6. | ||
==Calculating the charge on the droplets== | |||
==Acknowledgments== | ==Acknowledgments== |
Revision as of 20:40, 4 October 2009
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Milikan Oil DropPurposeThe purpose of this lab is to attempt to measure the electric charge of an electron in the same manner as Milikan. EquipmentPASCO scientific model AP-8210 Milikan Oil Drop Apparatus SafetyA high voltage power source (~500V DC) will be used, so it is essential to check all equipment for damage. ProcedureThe procedure was followed according to the manual included with the PASCO Apparatus. Raw DataWidth 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 .5mmDroplet 1Rise time in seconds: 8.59 Droplet 2Rise time in seconds: 16.83, 18.62 Droplet 3Rise time in seconds: 5.74, 2.79, 2.58, 2.72 Droplet 4Rise time in seconds: 5.03, 3.14, 3.00, 3.14, 3.00 Droplet 5Rise time in seconds: 4.47, 4.33, 4.40, 4.33, 4.40 Droplet 6Rise time in seconds: 7.75, 7.13, 8.10, 8.31, 8.31 Calculating the charge on the dropletsAcknowledgmentsErica Colon for assistance in recording data. |