In Millikan's ol-drop experiment, one looks at a small oll drop held motionless between two plates. Take the voltage between the plates to be 2120 V, and the plate separation to be 2.42 cm. The oil drop (of density 0.81 g/cm³) has a diameter of 4.00 x 10 m. Find the charge on the drop, in terms of electron units 1.8976-35 xe
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