EXPERIMENTS – ELECTRON TUBES

•  Record the characteristic for a thermionic diode at different cathode heater voltage •  Identify the space charge and saturation regions •  Confirm the Schottky-Langmuir law In ... more

At sufficiently high positive voltage between the cathode and anode (anode voltage), free electrons from the cathode can pass through the grid to reach the anode. The anode current generated in this way can be modulated by varying ... more

Electrons in a fine-beam tube are deflected into a circular path by a uniform magnetic field. The tube contains neon gas at a precisely defined pressure so that gas atoms become ionised by collision with electrons along the path thus ... more

•  Investigating the deflection of an electron beam in an electric field. •  Investigating the deflection of an electron beam in a magnetic field. •  Calibrating the frequency control of the sawtooth ... more

In the experiment, two identical current-carrying coils are placed outside the Braun tube, and the deflection of the electron beam in the magnetic fields of the coils is observed on the tube’s fluorescent screen as shifts of ... more

Experiment Topics: • Electron deflection in a uniform magnetic field • Closed orbit or spiral path • Determining an electron's specific charge e/m This complete experimental system is used to determine an electron ... more