Formula: Oil Drop Experiment (Levitation Method) Electric charge    Velocity    Oil density    Medium density   

Formula: Oil Drop Experiment (Levitation Method)
Suspended State of an Oil Droplet in the Oil Drop Experiment

Electric charge

Unit
The charge of the oil droplet. The oil droplet carries a multiple of the elementary charge \(e\).

Distance

Unit
Distance between the two capacitor plates.

Voltage

Unit
Voltage is applied between the two capacitor plates to accelerate charged oil droplets in the electric field.

Viscosity

Unit
Viscosity \( \eta \) (pronounced: Eta) is a property of a fluid (liquid or gas) and describes how difficult it is to move a body through this fluid.

Liquid Viscosity \( \eta \)
Olive oil\( 108 \cdot 10^{-3} \, \frac{\mathrm{kg}}{ \mathrm{m}\cdot \mathrm{s} } \)
Honey\( 10\,000 \cdot 10^{-3} \, \frac{\mathrm{kg}}{ \mathrm{m}\cdot \mathrm{s} } \)
Glycerin\( 1500 \cdot 10^{-3} \, \frac{\mathrm{kg}}{ \mathrm{m}\cdot \mathrm{s} } \)
Water\( 1.008 \cdot 10^{-3} \, \frac{\mathrm{kg}}{ \mathrm{m}\cdot \mathrm{s} } \)
Tar\( 100\,000 \cdot 10^{-3} \, \frac{\mathrm{kg}}{ \mathrm{m}\cdot \mathrm{s} } \)
Viscosity of some liquids.

Falling velocity

Unit
Terminal velocity at which the oil droplet sinks downwards inside the plate capacitor.

Oil density

Unit
Oil density specifies the mass of the oil droplet per volume.

Medium density

Unit
Density (mass per volume) of the medium between the capacitor plates.

Gravitational acceleration

Unit
Gravitational acceleration is the acceleration acting on oil droplets to the bottom. It has the value: \(g = 9.8 \, \frac{\mathrm m}{\mathrm{s}^2} \).

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