Which of the following was discovered in Milikan's oil drop experiment?

Q. Which of the following was discovered in Milikan's oil drop experiment?
Answer: Charge on an electron
Notes: R.A. Millikan devised a method known as oil drop experiment (1906-14), to determine the charge on the electrons. As per the experiment, the charge on the electron was found to be – 1.6 × 10^–19 C.

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