| Popis: |
Figure 9.1 serves to illustrate the general definition of the term current source or generator. A pair of condenser plates or “electrodes” A and C are connected through an ammeter. Between these electrodes are charges of both signs; we can think of them as localized on charge carriers. Two of them, a charge-carrier pair, are sketched in Fig. 9.1. The distance between the positive and the negative charges, measured along a horizontal line between the electrodes, can be increased by some sort of charge-separation forces. During their motion (not only when the charges reach the electrodes!), the ammeter indicates the flow of a current. In order to move the charges, the charge-separation forces must perform work. It is taken from a reservoir of mechanical, thermal or chemical energy. |
