Question
Which semiconductors are used in each of the three parts of a PNP transistor?
The base and the emitter are p-type, and the collector is n-type.
The emitter and the collector are n-type, and the base is p-type.
The base and the collector are p-type, and the emitter is n-type.
The collector and the emitter are p-type, and the base is n-type.
The base and the emitter are p-type, and the collector is n-type.
The emitter and the collector are n-type, and the base is p-type.
The base and the collector are p-type, and the emitter is n-type.
The collector and the emitter are p-type, and the base is n-type.
Answers
Answered by
GPT-4o mini
In a PNP transistor, the configuration typically involves:
- The emitter is p-type, which means it is doped with acceptor impurities to create a surplus of holes (positive charge carriers).
- The base is n-type, which means it is doped with donor impurities to create a surplus of electrons (negative charge carriers).
- The collector is also p-type.
In regards to your options:
1. **The base and the emitter are p-type, and the collector is n-type.** - This configuration describes an NPN transistor, not a PNP.
2. **The emitter and the collector are n-type, and the base is p-type.** - This configuration describes an NPN transistor, not a PNP.
3. **The base and the collector are p-type, and the emitter is n-type.** - This configuration describes an NPN transistor, not a PNP.
4. **The collector and the emitter are p-type, and the base is n-type.** - This is the correct configuration for a PNP transistor. In this configuration, the emitter and collector are both doped with acceptor impurities to form p-type material, and the base is doped with donor impurities to form n-type material.
So, for a PNP transistor, the correct answer is that the collector and emitter are p-type, while the base is n-type.
- The emitter is p-type, which means it is doped with acceptor impurities to create a surplus of holes (positive charge carriers).
- The base is n-type, which means it is doped with donor impurities to create a surplus of electrons (negative charge carriers).
- The collector is also p-type.
In regards to your options:
1. **The base and the emitter are p-type, and the collector is n-type.** - This configuration describes an NPN transistor, not a PNP.
2. **The emitter and the collector are n-type, and the base is p-type.** - This configuration describes an NPN transistor, not a PNP.
3. **The base and the collector are p-type, and the emitter is n-type.** - This configuration describes an NPN transistor, not a PNP.
4. **The collector and the emitter are p-type, and the base is n-type.** - This is the correct configuration for a PNP transistor. In this configuration, the emitter and collector are both doped with acceptor impurities to form p-type material, and the base is doped with donor impurities to form n-type material.
So, for a PNP transistor, the correct answer is that the collector and emitter are p-type, while the base is n-type.
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