Amplification in transistors described in high school physics textbooks ◯: satisfactory contents, △: partially
satisfactory contents, ×: unsatisfactory contents, ‘ - ’: missing contents.
Category | Contents | A | B | C | D | E |
---|---|---|---|---|---|---|
Description | Explanation of amplification in transistors | △ | △ | △ | ◯ | △ |
Explanation of how to connect a transistor as an amplifier in a circuit | △ | ◯ | ◯ | ◯ | ◯ | |
Explanation of the motion of majority charge carriers inside a transistor acting as an amplifier | △ | △ | ◯ | ◯ | ◯ | |
Making use of appropriate terms in the situation where majority charge carriers move due to an external voltage | ◯ | ◯ | × | × | × | |
Accurate description of the direction of electron flow inside a transistor and the role of external voltage | ◯ | ◯ | ◯ | × | × | |
Explanation of the doping concentration of the emitter, base, collector region of a transistor in terms of the flow of majority charge carrier | × | × | △ | △ | △ | |
Explanation of the thickness of the base region in terms of the flow of majority charge carrier | ◯ | △ | × | ◯ | ◯ | |
Illustration | Accurate presentation for flow of majority charge carriers inside a transistor acting as an amplifier | ◯ | ◯ | △ | ◯ | × |
Clear distinction between electrons and holes | × | × | ◯ | ◯ | - | |
Expressing doping concentration of the emitter and collector | × | ◯ | ◯ | × | - |