Question

explain the oil drop experiment

Answer 1

This experiment was done by Robert Millikan to determine the mass of an electron.
In an electric field, atomized oil particles were passed and it was observed that the charge on each particle was an integral multiple ofthe charge on one electron.
By using the ratios of energy and mass, the mass of an electron was found.
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Answer 2

$\textbf{Answer is in Attachment !}$