In Millikan's experiment, static electri...

In Millikan's experiment, static electric charge on the oil drops has been obtained by shining X-rays. If the static charge on the oil drop is `-1.282xx10^(-18)C`, calculate the number of electrons present on it.

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Charge of an electron`=-1.602xx10^(-19)C`
Thus, number of electrons contained in`-1.282xx10^(-18)C`
charge`=(-1.282xx10^(-18)C)/(-1.602xx10^(-19)C)=8`

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