What did Millikan measure in his oil-drop experiment?
A)the electric charge of an electron
B)the mass of an electron
C)the mass of oil drops
D)none of the above

Question

Quizplus · Accepted Answer

Millikan measured the electric charge of an electron in his oil-drop experiment. He observed the motion of charged oil drops in an electric field and calculated the charge on each drop by measuring their velocity and the strength of the field. By comparing the charges on different drops, he was able to determine that the charge on an electron is -1.602 x 10^-19 coulombs.

What Did Millikan Measure in His Oil-Drop Experiment