Electronics and Communication Engineering (ECE) Exam > Electronics and Communication Engineering (ECE) Questions > Which of the following statement is correct?a...
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Which of the following statement is correct?
- a)A p-type semiconductor is created by doping an intrinsic semiconductor with an acceptor impurity.
- b)Sodium and Nitrogen are examples of the semiconductor.
- c)An n-type semiconductor is created by doping an extrinsic semiconductor with a donor impurity
- d)Silicon of Group IV has two valance electron.
Correct answer is option 'A'. Can you explain this answer?
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Which of the following statement is correct?a)A p-type semiconductor i...
Correct Answer Explanation
The correct statement is option 'A': "A p-type semiconductor is created by doping an intrinsic semiconductor with an acceptor impurity."
Understanding P-Type Semiconductors
- Doping Process: Doping is the intentional introduction of impurities into an intrinsic semiconductor (like silicon) to modify its electrical properties.
- Acceptor Impurities: In p-type semiconductors, acceptor impurities (such as boron) are added. These impurities have fewer valence electrons (three) compared to silicon (four). When introduced, they create "holes" in the crystal lattice where an electron is missing.
- Charge Carriers: The holes act as positive charge carriers. Thus, this type of semiconductor conducts electricity primarily through the movement of these holes.
Incorrect Statements Analysis
- Option B: "Sodium and Nitrogen are examples of the semiconductor."
- *Incorrect*: Sodium is a metal and nitrogen is a non-metal. Neither is used as a semiconductor.
- Option C: "An n-type semiconductor is created by doping an extrinsic semiconductor with a donor impurity."
- *Incorrect*: N-type semiconductors are created by doping intrinsic semiconductors with donor impurities (like phosphorus), not extrinsic.
- Option D: "Silicon of Group IV has two valence electrons."
- *Incorrect*: Silicon has four valence electrons, which is characteristic of Group IV elements.
Conclusion
In summary, option 'A' accurately describes the process of creating a p-type semiconductor through the addition of acceptor impurities, making it the correct choice among the provided statements.
The correct statement is option 'A': "A p-type semiconductor is created by doping an intrinsic semiconductor with an acceptor impurity."
Understanding P-Type Semiconductors
- Doping Process: Doping is the intentional introduction of impurities into an intrinsic semiconductor (like silicon) to modify its electrical properties.
- Acceptor Impurities: In p-type semiconductors, acceptor impurities (such as boron) are added. These impurities have fewer valence electrons (three) compared to silicon (four). When introduced, they create "holes" in the crystal lattice where an electron is missing.
- Charge Carriers: The holes act as positive charge carriers. Thus, this type of semiconductor conducts electricity primarily through the movement of these holes.
Incorrect Statements Analysis
- Option B: "Sodium and Nitrogen are examples of the semiconductor."
- *Incorrect*: Sodium is a metal and nitrogen is a non-metal. Neither is used as a semiconductor.
- Option C: "An n-type semiconductor is created by doping an extrinsic semiconductor with a donor impurity."
- *Incorrect*: N-type semiconductors are created by doping intrinsic semiconductors with donor impurities (like phosphorus), not extrinsic.
- Option D: "Silicon of Group IV has two valence electrons."
- *Incorrect*: Silicon has four valence electrons, which is characteristic of Group IV elements.
Conclusion
In summary, option 'A' accurately describes the process of creating a p-type semiconductor through the addition of acceptor impurities, making it the correct choice among the provided statements.
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Community Answer
Which of the following statement is correct?a)A p-type semiconductor i...
- Semiconductors possess specific electrical properties.
- A substance that conducts electricity is called a conductor, and a substance that does not conduct electricity is called an insulator.
- Semiconductors are substances with properties somewhere between them.
n-type semiconductor:
- An n-type semiconductor is an intrinsic semiconductor doped with Phosphorus (P), arsenic (As), or antimony (Sb) as an impurity.
- Silicon of Group IV has four valence electrons and phosphorus of Group V has five valence electrons.
- If a small amount of phosphorus is added to a pure silicon crystal, one of the valence electrons of phosphorus becomes free to move around as a surplus electron.
- When this free electron is attracted to the “+” electrode and moves, current flows.
P-type semiconductor:
- A p-type semiconductor is an intrinsic semiconductor doped with boron (B) or indium (In).
- Silicon of Group IV has four valence electrons and boron of Group III has three valence electrons.
- If a small amount of boron is doped to a single crystal of silicon, valence electrons will be insufficient at one position to bond silicon and boron, resulting in holes that lack electrons.
- When a voltage is applied in this state, the neighboring electrons move to the hole, so that the place where an electron was present becomes a new hole, and the holes appear to move to the "–" electrode in sequence.
- A p-type semiconductor is created by doping an intrinsic semiconductor with an acceptor impurity.
- An n-type semiconductor is created by doping an intrinsic semiconductor with a donor impurity
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Which of the following statement is correct?a)A p-type semiconductor is created by doping an intrinsic semiconductor with an acceptor impurity.b)Sodium and Nitrogen are examples of the semiconductor.c)An n-type semiconductor is created by doping an extrinsic semiconductor with a donor impurityd)Silicon of Group IV has two valance electron.Correct answer is option 'A'. Can you explain this answer?
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Which of the following statement is correct?a)A p-type semiconductor is created by doping an intrinsic semiconductor with an acceptor impurity.b)Sodium and Nitrogen are examples of the semiconductor.c)An n-type semiconductor is created by doping an extrinsic semiconductor with a donor impurityd)Silicon of Group IV has two valance electron.Correct answer is option 'A'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about Which of the following statement is correct?a)A p-type semiconductor is created by doping an intrinsic semiconductor with an acceptor impurity.b)Sodium and Nitrogen are examples of the semiconductor.c)An n-type semiconductor is created by doping an extrinsic semiconductor with a donor impurityd)Silicon of Group IV has two valance electron.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statement is correct?a)A p-type semiconductor is created by doping an intrinsic semiconductor with an acceptor impurity.b)Sodium and Nitrogen are examples of the semiconductor.c)An n-type semiconductor is created by doping an extrinsic semiconductor with a donor impurityd)Silicon of Group IV has two valance electron.Correct answer is option 'A'. Can you explain this answer?.
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