Table. 2.

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 × × -
New Phys.: Sae Mulli 2022;72:409~418 https://doi.org/10.3938/NPSM.72.409
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