Millikan

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Millikans Oil Drop Experiment
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What is the charge on a single electron?
3
Apparatus
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Forces
Floating Eq mg q mg/E
Eq
mg
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Trial 1
q 1.2 C

- - - - - - - - - - -
- -
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Trial 2
q 2.4 C

- - - - - - - - - - -
- -
7
Trial 3
q 4.8 C

- - - - - - - - - - -
- -
8
Trial 4
q 7.2 C

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- -
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Results
Trial 1 1.2 C Trial 2 2.4 C Trial 3 4.8
C Trial 4 7.2 C Common 1.2 C
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Charge on an Electron
1.6 x 10-19 C