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Question

How was the charge of an electron determined?


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Solution

Determining the charge of an Electron

  • The charge on an electron was determined by American physicist Robert Andrews Millikan in between the years 1906 and 1914.
  • The charge of an electron was determined in an experiment named Millikan's Oil Drop Experiment.
  • This experiment involves the application of a high potential difference between two horizontal metallic plates.
  • These plates were held apart by an insulating material.
  • When oil was sprayed into a chamber above the plates.
  • The oil obtained an electric charge and began to rise.
  • After certain calculations, the charge of the electron was found to be -1.6×10-19 Coulombs.

Therefore, the charge of an electron was determined by Millikan in Millikan's Oil Drop Experiment.


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