# Formula Oil Drop Experiment (Levitation Method) Electric charge    Falling velocity    Oil density    Medium density ## 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 (Pronounced: "Eta") describes how viscous the medium (e.g. water) is between the two capacitor plates.

## 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: $$g = 9.8 \, \frac{\mathrm m}{\mathrm{s}^2}$$.