Concepts Of Physics MCQ Edition [Volume 2]
- Exam
- Concepts Of Physics MCQ Edition [Volume 2]
- Subject
- Physics
- Chapter
- Semiconductors and Semiconductor Devices
Concepts Of Physics MCQ Edition [Volume 2] · Physics · Semiconductors and Semiconductor Devices
Within a transistor,
Within a transistor,
Options
- Aall three regions have identical impurity concentrations
- Bthe emitter has the lowest impurity concentration
- Cthe collector has the lowest impurity concentration
- Dthe base has the lowest impurity concentration
Correct answer
D. the base has the lowest impurity concentration
Step-by-step solution
In a transistor, the three regions have different levels of doping.
The emitter is heavily doped to inject a large number of charge carriers into the base.
The base is very thin and lightly doped to minimize the recombination of charge carriers.
The collector is moderately doped.
Therefore, the base has the lowest impurity concentration.
The emitter is heavily doped to inject a large number of charge carriers into the base.
The base is very thin and lightly doped to minimize the recombination of charge carriers.
The collector is moderately doped.
Therefore, the base has the lowest impurity concentration.