Physics · A-Level · AQA · AQA A-level Physics (7408) · Specification point · 3.12.1.4 · Turning points in physics (A-level only) · The discovery of the electron (A-level only)
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3.12.1.4 Principle of Millikan’s determination of the electronic charge, e (A-level only)
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Condition for holding a charged oil droplet, of charge Q, stationary between oppositely charged parallel plates. |
Motion of a falling oil droplet with and without an electric field; terminal speed to determine the mass and the charge of the droplet.
Stokes’ Law for the viscous force on an oil droplet used to calculate the droplet radius.
Significance of Millikan’s results.
Quantisation of electric charge.