Elementary charge and Millikan experiment
Charged oil droplets subjected to an electric field and to gravity between the plates of a capacitor are accelerated by application of a voltage. The elementary charge is determined from the velocities in the direction of gravity and in the opposite direction.
- Fascination Nobel Prize (Millikan 1923)
- Exact determination of the elementary electric charge
- Compact set-up
Millikan apparatus
PHYWE power supply, regulated DC: 0…12 V, 0,5 A; 0…650 V, 50 mA / AC: 6,3 V, 2 A
Object micrometer 1 mm in 100 parts
Cover glasses 18×18 mm, 50 pcs.
Tripod base PHYWE
Stand tube
Circular level, d = 36 mm
Polarity Switch for Millikan Apparatus
Multi-range meter w.overl.prot.
Conn.cord,safety,32A,50cm, red
Conn.cord,safety,32A,100cm, red
Conn.cord,safety,32A,100cm, blue
Connecting cord, 32 A, 750 mm, black
Connecting cord, 32 A, 750 mm, green-yellow
- Measurement of the rise and fall times of oil droplets with various charges at different voltages.
- Determination of the radii and the charge of the droplets.
- Electric field
- Viscosity
- Stokes’ law
- Droplet method
- Electron charge