BRAINCAKEMillikan's Oil Drop Experiment
Millikan was able to calculate the charge on an electron.
Oil is squirted through a hole in a metal plate. The tiny droplets are examined through a microscope.
The magnitude and direction of the p.d. is adjusted so that it is held suspended by equal and opposite forces.
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Key terms in this lesson
- velocity
- The rate of change of displacement of an object; speed in a given direction.
- terminal velocity
- The constant maximum velocity reached by an object moving through a fluid when the resultant force on it is zero, because the drag force has become equal to the driving force.
- density
- The mass per unit volume of a substance.
- power
- The rate at which work is done, or the rate of transfer of energy.
More in Electricity
- Electric Charge
- Electric Current
- The Flow of Charge in Metals and Electrolytes
- Kirchoff's First Law and Conservation of Charge
- Conductors and Semi-Conductors
- Current and Drift Velocity
- Potential Difference
- Electromotive Force
All 30 lessons in Electricity · All OCR AS-level Physics topics