3B SCIENTIFIC PHYSICS U19157 Manuel D'utilisation page 12

This 'striking' process is characterised by brief lu-
minescence and the simultaneous reduction of the
capacitor voltage.
•
By counting the instances of luminescence and
measuring the time with a stopwatch, deter-
As the striking voltage decreases (i.e. increasing
grid voltage) the frequency gets larger.
Fig. 1 Recording the I – U
A A
Fig. 2 Evidence for positive charge carriers
4
mine the frequency of oscillation for various
anode and grid potentials.
characteristic