3) In Millikan’s oil drop experiment an oil drop with N additional electrons and mass m is subjected to an electric field E. It is observed that the oil drop is moving downward at constant velocity v. The friction force on the electron is kv. Gravity is negligible. a) Draw a figure and show the directions of the friction force Fr and the electric force Fe. b) Find the charge q of the oil drop in terms of k, v and E. c) Find the number of electrons N on the oil drop in terms of k,v, E and e.
3) In Millikan’s oil drop experiment an oil drop with N additional electrons and mass m is subjected to an electric field E. It is observed that the oil drop is moving downward at constant velocity v. The friction force on the electron is kv. Gravity is negligible. a) Draw a figure and show the directions of the friction force Fr and the electric force Fe. b) Find the charge q of the oil drop in terms of k, v and E. c) Find the number of electrons N on the oil drop in terms of k,v, E and e.
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Transcribed Image Text:3) In Millikan’s oil drop experiment an oil drop with
N additional electrons and mass m is subjected to an electric field E. It is observed
that the oil drop is moving downward at constant velocity v. The friction force on
the electron is kv. Gravity is negligible.
a) Draw a figure and show the directions of the friction force Ff and the electric
force Fe.
b) Find the charge q of the oil drop in terms of k, v and E.
c) Find the number of electrons N on the oil drop in terms of k,v, E and e.
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