A. Mass spectrometric experiment
B. Oil-drop experiment
C. Scattering α – particles
D. Discharge-tube experiment
Correct Answer:
Option B – Oil-drop experiment
Explanation
In 1909, Robert Millikan and Harvey Fletcher conducted the oil drop experiment to determine the charge of an electron.


![If 16mA of current flows through a conductor in one second; the number of electron transported per seconds is? [1 electronic charge = 1.6 x 10^-19C] If 16mA of current flows through a conductor in one second; the number of electron transported per seconds is? [1 electronic charge = 1.6 x 10^-19C]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png)