Investigating the Deflection of Electrons in Electrical and Magnetic Fields

The experiment P3.8.5.1 investigates the deflection of electrons in electric and magnetic fields. For different anode voltages UA, the beam path of the electrons is observed when the deflection voltage UP at the plate capacitor is varied. Additionally, the electrons are deflected in the magnetic field of the Helmholtz coils by varying the coil currentI. The point at which the electron beam emerges from the fluorescent screen gives us the radius R of the orbit. When we insert the anode voltage in the following equation, we can obtain an experimental value for the specific electron charge whereby the magnetic field B is calculated from the current I.

COMPONENTS OF EQUIPMENT SETS

1	555 624	Electron deflection tube
1	555 600	Tube stand
1	555 604	Pair of Helmholtz coils
2	521 70	High-voltage power supply, 10 kV
1	521 546	DC Power Supply 0 ... 16 V, 0 ... 5 A
2	500 611	Safety connecting lead, 25 cm, red
1	500 621	Safety connecting lead, 50 cm, red
1	500 622	Safety connecting lead, 50 cm, blue
2	500 641	Safety connecting lead, 100 cm, red
4	500 642	Safety connecting lead, 100 cm, blue
2	500 644	Safety connecting lead, 100 cm, black

EXPERIMENT INSTRUCTIONS PLEASE CLICK HERE