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# In Millikan’s oil drop experiment, we make use of:(A) Ohm’s law(B) Ampere’s law(C) Stokes law(D) Faraday’s law

Last updated date: 18th Jun 2024
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Hint: Robert Millikan in 1909 performed an experiment to determine the charge on an electron. For his work he received a Nobel Prize. The name of the experiment is Oil drop experiment. In the oil drop experiment Robert Millikan used charged oil droplets to determine the charge on the electron.

* To find the weight of the oil drop, Millikan allowed the oil drop to fall through the air in the oil drop experiment.
* Oil drop quickly reaches its terminal velocity and at this point, the weight of the drop is being balanced by the viscous effort of the air.
* The effort of the air can be calculated by using Stokes' Law, which endorsed Millikan to determine the weight of the drop.
Therefore Millikan used Stokes law in the oil drop experiment.

So, the correct option is C.