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. + II Assume the oil drop to be 2.20 μm in radius and have a density of 957 kg/m³. (a) Find the weight of the drop. N microscope (b) If the drop has a single excess electron, find the magnitude of the electric field strength needed to balance its weight. N/C
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. + II Assume the oil drop to be 2.20 μm in radius and have a density of 957 kg/m³. (a) Find the weight of the drop. N microscope (b) If the drop has a single excess electron, find the magnitude of the electric field strength needed to balance its weight. N/C
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Transcribed Image Text: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.
GI
Assume the oil drop to be 2.20 μm in radius and have a density of 957 kg/m³.
(a) Find the weight of the drop.
N
+
microscope
(b) If the drop has a single excess electron, find the magnitude of the electric field strength needed to balance its weight.
N/C
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