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Which of the following are true for a PNP transistor?
- a)the emitter current is less than the collector current
- b)the collector current is less than the emitter current
- c)the electrons are majority charge carriers
- d)the holes are the minority charge carriers
Correct answer is option 'B'. Can you explain this answer?
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Which of the following are true for a PNP transistor?a)the emitter cur...
The 2 – 5% of holes is lost in recombination with electrons in the base region. The majority charge carriers are holes for a PNP transistor. Thus the collector current is slightly less than the emitter current.
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Which of the following are true for a PNP transistor?a)the emitter cur...
PNP Transistor Basics:
A PNP (Positive-Negative-Positive) transistor is a three-layered semiconductor device that consists of a P-type layer sandwiched between two N-type layers. The layers are referred to as the emitter, base, and collector. The PNP transistor operates by controlling the flow of current between the emitter and collector terminals using a small current at the base terminal.
Explanation:
Among the given options, option 'b' is true, which states that the collector current is less than the emitter current. Let's understand why this is the case.
1. Emitter Current vs. Collector Current:
- In a PNP transistor, the emitter current (Ie) is the sum of the base current (Ib) and the collector current (Ic), i.e., Ie = Ib + Ic.
- The emitter current is the total current flowing into the emitter terminal, while the collector current is the current flowing into the collector terminal.
- Since the emitter current is the sum of the base and collector currents, it is always greater than the collector current.
- This is because a portion of the emitter current flows into the base terminal to control the larger collector current.
2. Majority and Minority Charge Carriers:
- In a PNP transistor, the majority charge carriers are holes (positively charged) in the P-type region, while the minority charge carriers are electrons (negatively charged) in the N-type regions.
- In the emitter region, the P-type material has a high concentration of holes compared to the N-type material's minority electrons.
- Similarly, in the collector region, the P-type material has a high concentration of holes compared to the N-type material's minority electrons.
Conclusion:
Based on the above explanations, we can conclude that option 'b' is true, i.e., the collector current is less than the emitter current. Additionally, we can also mention that the PNP transistor operates with holes as the majority charge carriers and electrons as the minority charge carriers.
A PNP (Positive-Negative-Positive) transistor is a three-layered semiconductor device that consists of a P-type layer sandwiched between two N-type layers. The layers are referred to as the emitter, base, and collector. The PNP transistor operates by controlling the flow of current between the emitter and collector terminals using a small current at the base terminal.
Explanation:
Among the given options, option 'b' is true, which states that the collector current is less than the emitter current. Let's understand why this is the case.
1. Emitter Current vs. Collector Current:
- In a PNP transistor, the emitter current (Ie) is the sum of the base current (Ib) and the collector current (Ic), i.e., Ie = Ib + Ic.
- The emitter current is the total current flowing into the emitter terminal, while the collector current is the current flowing into the collector terminal.
- Since the emitter current is the sum of the base and collector currents, it is always greater than the collector current.
- This is because a portion of the emitter current flows into the base terminal to control the larger collector current.
2. Majority and Minority Charge Carriers:
- In a PNP transistor, the majority charge carriers are holes (positively charged) in the P-type region, while the minority charge carriers are electrons (negatively charged) in the N-type regions.
- In the emitter region, the P-type material has a high concentration of holes compared to the N-type material's minority electrons.
- Similarly, in the collector region, the P-type material has a high concentration of holes compared to the N-type material's minority electrons.
Conclusion:
Based on the above explanations, we can conclude that option 'b' is true, i.e., the collector current is less than the emitter current. Additionally, we can also mention that the PNP transistor operates with holes as the majority charge carriers and electrons as the minority charge carriers.
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Which of the following are true for a PNP transistor?a)the emitter current is less than the collector currentb)the collector current is less than the emitter currentc)the electrons are majority charge carriersd)the holes are the minority charge carriersCorrect answer is option 'B'. Can you explain this answer?
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