Class 12 Exam > Class 12 Questions > A p- type semiconductor can be obtained by ad...
Start Learning for Free
A p- type semiconductor can be obtained by adding
- a)gallium to pure silicon
- b)phosphorus to pure germanium
- c)arsenic to pure silicon
- d)antimony to pure germanium
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A p- type semiconductor can be obtained by addinga)gallium to pure sil...
Explanation:In P-type doping, boron or gallium is the dopant. Boron and gallium each have only three outer electrons. When mixed into the silicon lattice, they form "holes" in the lattice where a silicon electron has nothing to bond to. The absence of an electron creates the effect of a positive charge, hence the name P-type.Holes can conduct current. A hole happily accepts an electron from a neighbor, moving the hole over a space. P-type silicon is a good conductor.
Most Upvoted Answer
A p- type semiconductor can be obtained by addinga)gallium to pure sil...
Understanding P-Type Semiconductors
P-type semiconductors are created by introducing certain impurities into intrinsic (pure) semiconductors. The type of impurity added determines the conductivity type of the semiconductor.
What is P-Type Semiconductor?
- A p-type semiconductor is characterized by an abundance of "holes" or positive charge carriers.
- These holes are created when trivalent impurities (elements with three valence electrons) are introduced into a pure semiconductor.
Why Gallium in Silicon?
- Gallium (Ga) is a trivalent element. When added to pure silicon, which has four valence electrons, gallium forms bonds with silicon atoms.
- Hole Creation: Gallium contributes only three electrons for bonding, leaving one silicon atom without a complete bond, creating a "hole."
- Majority Carriers: These holes act as positive charge carriers, making the semiconductor p-type.
Comparison with Other Options
- Phosphorus in Germanium: Phosphorus is a pentavalent element that adds extra electrons, leading to n-type conductivity, not p-type.
- Arsenic in Silicon: Similar to phosphorus, arsenic is also pentavalent, resulting in n-type conductivity.
- Antimony in Germanium: Antimony is another pentavalent element, which also leads to n-type conductivity.
Conclusion
- By understanding the role of impurities, we see that adding gallium to pure silicon effectively creates a p-type semiconductor. This process is crucial for various electronic applications, including diodes and transistors.
P-type semiconductors are created by introducing certain impurities into intrinsic (pure) semiconductors. The type of impurity added determines the conductivity type of the semiconductor.
What is P-Type Semiconductor?
- A p-type semiconductor is characterized by an abundance of "holes" or positive charge carriers.
- These holes are created when trivalent impurities (elements with three valence electrons) are introduced into a pure semiconductor.
Why Gallium in Silicon?
- Gallium (Ga) is a trivalent element. When added to pure silicon, which has four valence electrons, gallium forms bonds with silicon atoms.
- Hole Creation: Gallium contributes only three electrons for bonding, leaving one silicon atom without a complete bond, creating a "hole."
- Majority Carriers: These holes act as positive charge carriers, making the semiconductor p-type.
Comparison with Other Options
- Phosphorus in Germanium: Phosphorus is a pentavalent element that adds extra electrons, leading to n-type conductivity, not p-type.
- Arsenic in Silicon: Similar to phosphorus, arsenic is also pentavalent, resulting in n-type conductivity.
- Antimony in Germanium: Antimony is another pentavalent element, which also leads to n-type conductivity.
Conclusion
- By understanding the role of impurities, we see that adding gallium to pure silicon effectively creates a p-type semiconductor. This process is crucial for various electronic applications, including diodes and transistors.
|
Explore Courses for Class 12 exam
|
|
Top Courses for Class 12View all
Question Description
A p- type semiconductor can be obtained by addinga)gallium to pure siliconb)phosphorus to pure germaniumc)arsenic to pure silicond)antimony to pure germaniumCorrect answer is option 'A'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about A p- type semiconductor can be obtained by addinga)gallium to pure siliconb)phosphorus to pure germaniumc)arsenic to pure silicond)antimony to pure germaniumCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A p- type semiconductor can be obtained by addinga)gallium to pure siliconb)phosphorus to pure germaniumc)arsenic to pure silicond)antimony to pure germaniumCorrect answer is option 'A'. Can you explain this answer?.
A p- type semiconductor can be obtained by addinga)gallium to pure siliconb)phosphorus to pure germaniumc)arsenic to pure silicond)antimony to pure germaniumCorrect answer is option 'A'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about A p- type semiconductor can be obtained by addinga)gallium to pure siliconb)phosphorus to pure germaniumc)arsenic to pure silicond)antimony to pure germaniumCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A p- type semiconductor can be obtained by addinga)gallium to pure siliconb)phosphorus to pure germaniumc)arsenic to pure silicond)antimony to pure germaniumCorrect answer is option 'A'. Can you explain this answer?.
Solutions for A p- type semiconductor can be obtained by addinga)gallium to pure siliconb)phosphorus to pure germaniumc)arsenic to pure silicond)antimony to pure germaniumCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.
Here you can find the meaning of A p- type semiconductor can be obtained by addinga)gallium to pure siliconb)phosphorus to pure germaniumc)arsenic to pure silicond)antimony to pure germaniumCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
A p- type semiconductor can be obtained by addinga)gallium to pure siliconb)phosphorus to pure germaniumc)arsenic to pure silicond)antimony to pure germaniumCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for A p- type semiconductor can be obtained by addinga)gallium to pure siliconb)phosphorus to pure germaniumc)arsenic to pure silicond)antimony to pure germaniumCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of A p- type semiconductor can be obtained by addinga)gallium to pure siliconb)phosphorus to pure germaniumc)arsenic to pure silicond)antimony to pure germaniumCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice A p- type semiconductor can be obtained by addinga)gallium to pure siliconb)phosphorus to pure germaniumc)arsenic to pure silicond)antimony to pure germaniumCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Class 12 tests.
|
|
Explore Courses for Class 12 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup on EduRev and stay on top of your study goals
10M+ students crushing their study goals daily