question_answer 58)

In Millikan's experiment, static electric charge on the oil drops has been obtained by shining X-rays. If the static electric charge on the oil drop is \[-1.282\times {{10}^{-18}}C,\]calculate the number of electrons present in it.

Answer:

Let n electrons are present in the charged particle. \[n\times {{q}_{e}}=-1.282\times {{10}^{-18}}\] \[n\times (-1.6\times {{10}^{-19}})=-1.282\times {{10}^{-18}}\] n = 8 electrons