Abstract
In this paper, the authors describe the physical mechanism relating to a control characteristic of the Johnsen-Rahbek effect and controlled by a third electode.
It is found that the operation of the third electrode displays some new physical phenomena.
The results obtained are as follws:
1. The mechanical force is controlled by the third electrode potential.
2. The control characteristic is of V-shape and the mechanical force produced depends on the potential difference between a main voltage and a control voltge.
3. When the main voltage is equall to the control voltage, the mechanical force is produced.
4. The peeling off time of the three electrode type is one order shorter than that of the two electrode type.
