The classic Millikan oil drop experiment was the first to obtain an accurate measurement of the charge on an electron. In it, oil drops were
The classic Millikan oil drop experiment was the first to obtain an accurate measurement of the charge on an electron. In it, oil drops were suspended against gravity by a vertical electric field. Assume the oil drop to be 2.30 um in radius and have a density of 934 kg/m 3 . a) Find the weight of the drop. b) If the drop has a single excess electron, find the magnitude of the electric field strength needed to balance its weight. : +
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