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This experiment first described by [Millikan, 1913] is based on the fact that different forces act on an electrically charged oil drop moving in the homogeneous electric field of a plate capacitor (Figure 1).
THEORY. In this experiment you will use tiny droplets of oil. When these droplets fall under the influence of gravity it takes them only a few milliseconds to reach a terminal (constant) speed vf, where the downward force of gravity is balanced by the upward drag force from the air.
Robert Andrews Millikan constructed an experiment where oil was atomized (sprayed through a ne nozzle) to form tiny droplets between two oppositely charged parallel metal plates. Some of the oil droplets pick up one or more excess electrons while passing through the atomizer.
Oil drop experiment. Robert A. Millikan.. (1909). q=1.5924(17)×10−19. Shot noise experiment. First proposed by Walter H. Schottky. In terms of the Avogadro constant and Faraday constant. =. F- Faraday constant, NA - Avagadro constant.
forces act on an electrically charged oil drop moving in the homogeneous Robert A. Millikan electric field of a plate capacitor (Fig.1). Going through the capillary of the around 1923 atomizer, the oil droplets acquire electric charge due to friction. The effect is known as triboelectric charging.
In 1909, Robert Millikan and Harvey Fletcher developed an experiment to determine the fundamental charge of the electron. This was achieved by measuring the charge of oil drops in a known electric field.
Agenda. 1. Measuring of the charge of. electron. 2. Robert Millikan and his oil drop. experiment. 3. Theory of the experiment.
