Experiment: Perrin tube (230 V, 50/60 Hz)

Experiment: Perrin tube (230 V, 50/60 Hz), 8000664 [UE3070400-230], Electron tubes
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Thematic focus: ..
•  Observing the thermionic emission of charge-carriers from a heated cathode.
•  Determining the polarity of the emitted charge-carriers.
•  Estimating the specific charge (chargeto-mass ratio) of the charge-carriers.

Experiment description: ..
In the experiment, the electron beam is deflected by the homogeneous magnetic field of a Helmholtz coil pair into the Faraday cup, which is connected to an electroscope. From the observed charging or discharging of the electroscope by the electron beam entering the Faraday cup, it is possible to determine the polarity of the charge-carriers
It is also possible to estimate the specific charge of the charge-carriers, since the radius of curvature r of the curved path into the Faraday cup is known. The centripetal force acting on the charge-carriers in this curved path is given by the Lorentz force.


Delivery scope

Perrin Tube S, 1000616 [U18554], Electron Tubes S

Perrin Tube S

1000616 [U18554]
Unit price
596.00 €
Helmholtz Coils S, 1000611 [U185051], Electron Tubes S

Helmholtz Coils S

1000611 [U185051]
Unit price
426.00 €
High Voltage Power Supply 5 kV (230 V, 50/60 Hz), 1003310 [U33010-230], Power Supplies

High Voltage Power Supply 5 kV (230 V, 50/60 Hz)

1003310 [U33010-230]
Unit price
585.00 €
DC Power Supply 20 V, 5 A
(230 V, 50/60 Hz), 1003312 [U33020-230], Power Supplies

DC Power Supply 20 V, 5 A
(230 V, 50/60 Hz)

1003312 [U33020-230]
Unit price
283.00 €
Kolbe's Electroscope, 1001027 [U8532131], Electrostatics

Kolbe's Electroscope

1001027 [U8532131]
Unit price
239.00 €
Set of 15 Safety Experiment Leads, 75 cm, 2.5 mm², 1002843 [U138021], Circuits

Set of 15 Safety Experiment Leads, 75 cm, 2.5 mm²

1002843 [U138021]
Unit price
96.00 €
Item No.: 8000664 [UE3070400-230]
Brand 3B Scientific
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