Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > at room temperature intrinsic carrier concent...
Start Learning for Free
at room temperature intrinsic carrier concentration is higher in germanium than in silicon because __________.
- a)Carrier mobilities are higher Ge than in Si
- b)energy gap in Ge is smaller than that in Si
- c)Atomic number of Ge is larger than in Si
- d)Atomic weight of Ge is larger than in Si
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
at room temperature intrinsic carrier concentration is higher in germa...
Carrier concentrations depends on the energy gap in the intrinsic semiconductor. In the case of Ge and Si the intrinsic carrier concentration of Ge is higher than that of Si because the energy gap in Ge is smaller than that of Si.
Most Upvoted Answer
at room temperature intrinsic carrier concentration is higher in germa...
Intrinsic Carrier Concentration in Germanium and Silicon at Room Temperature
Introduction:
Intrinsic carrier concentration refers to the concentration of charge carriers (electrons and holes) in a material when it is in a pure, undoped state. The intrinsic carrier concentration is an important parameter in semiconductor physics as it determines the material's electrical conductivity. Germanium (Ge) and silicon (Si) are two commonly used semiconductor materials. At room temperature, the intrinsic carrier concentration in germanium is higher than in silicon. This can be attributed to the smaller energy gap in germanium compared to silicon.
Explanation:
1. Carrier mobility:
- Carrier mobility refers to the ease with which charge carriers move through a material under the influence of an electric field.
- Option 'A' suggests that carrier mobilities are higher in germanium than in silicon. However, carrier mobility is not directly related to intrinsic carrier concentration.
2. Energy gap:
- The energy gap, also known as the bandgap, is the energy difference between the valence band and the conduction band in a semiconductor material.
- Option 'B' states that the energy gap in germanium is smaller than that in silicon, which is correct.
- Germanium has a smaller energy gap of approximately 0.67 eV, while silicon has a larger energy gap of approximately 1.1 eV.
- The smaller energy gap in germanium allows for a higher probability of thermal excitation, leading to a higher intrinsic carrier concentration at room temperature.
3. Atomic number and atomic weight:
- Options 'C' and 'D' suggest that the atomic number and atomic weight of germanium are larger than silicon.
- While these factors may contribute to certain material properties, they are not directly related to intrinsic carrier concentration.
Conclusion:
The correct answer is option 'B' - the energy gap in germanium is smaller than that in silicon. This smaller energy gap allows for a higher intrinsic carrier concentration in germanium at room temperature.
Introduction:
Intrinsic carrier concentration refers to the concentration of charge carriers (electrons and holes) in a material when it is in a pure, undoped state. The intrinsic carrier concentration is an important parameter in semiconductor physics as it determines the material's electrical conductivity. Germanium (Ge) and silicon (Si) are two commonly used semiconductor materials. At room temperature, the intrinsic carrier concentration in germanium is higher than in silicon. This can be attributed to the smaller energy gap in germanium compared to silicon.
Explanation:
1. Carrier mobility:
- Carrier mobility refers to the ease with which charge carriers move through a material under the influence of an electric field.
- Option 'A' suggests that carrier mobilities are higher in germanium than in silicon. However, carrier mobility is not directly related to intrinsic carrier concentration.
2. Energy gap:
- The energy gap, also known as the bandgap, is the energy difference between the valence band and the conduction band in a semiconductor material.
- Option 'B' states that the energy gap in germanium is smaller than that in silicon, which is correct.
- Germanium has a smaller energy gap of approximately 0.67 eV, while silicon has a larger energy gap of approximately 1.1 eV.
- The smaller energy gap in germanium allows for a higher probability of thermal excitation, leading to a higher intrinsic carrier concentration at room temperature.
3. Atomic number and atomic weight:
- Options 'C' and 'D' suggest that the atomic number and atomic weight of germanium are larger than silicon.
- While these factors may contribute to certain material properties, they are not directly related to intrinsic carrier concentration.
Conclusion:
The correct answer is option 'B' - the energy gap in germanium is smaller than that in silicon. This smaller energy gap allows for a higher intrinsic carrier concentration in germanium at room temperature.
Attention Electrical Engineering (EE) Students!
To make sure you are not studying endlessly, EduRev has designed Electrical Engineering (EE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Electrical Engineering (EE).
|
Explore Courses for Electrical Engineering (EE) exam
|
|
Similar Electrical Engineering (EE) Doubts
Top Courses for Electrical Engineering (EE)View all
at room temperature intrinsic carrier concentration is higher in germanium than in silicon because __________.a)Carrier mobilities are higher Ge than in Sib)energy gap in Ge is smaller than that in Sic)Atomic number of Ge is larger than in Sid)Atomic weight of Ge is larger than in SiCorrect answer is option 'B'. Can you explain this answer?
Question Description
at room temperature intrinsic carrier concentration is higher in germanium than in silicon because __________.a)Carrier mobilities are higher Ge than in Sib)energy gap in Ge is smaller than that in Sic)Atomic number of Ge is larger than in Sid)Atomic weight of Ge is larger than in SiCorrect answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about at room temperature intrinsic carrier concentration is higher in germanium than in silicon because __________.a)Carrier mobilities are higher Ge than in Sib)energy gap in Ge is smaller than that in Sic)Atomic number of Ge is larger than in Sid)Atomic weight of Ge is larger than in SiCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for at room temperature intrinsic carrier concentration is higher in germanium than in silicon because __________.a)Carrier mobilities are higher Ge than in Sib)energy gap in Ge is smaller than that in Sic)Atomic number of Ge is larger than in Sid)Atomic weight of Ge is larger than in SiCorrect answer is option 'B'. Can you explain this answer?.
at room temperature intrinsic carrier concentration is higher in germanium than in silicon because __________.a)Carrier mobilities are higher Ge than in Sib)energy gap in Ge is smaller than that in Sic)Atomic number of Ge is larger than in Sid)Atomic weight of Ge is larger than in SiCorrect answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about at room temperature intrinsic carrier concentration is higher in germanium than in silicon because __________.a)Carrier mobilities are higher Ge than in Sib)energy gap in Ge is smaller than that in Sic)Atomic number of Ge is larger than in Sid)Atomic weight of Ge is larger than in SiCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for at room temperature intrinsic carrier concentration is higher in germanium than in silicon because __________.a)Carrier mobilities are higher Ge than in Sib)energy gap in Ge is smaller than that in Sic)Atomic number of Ge is larger than in Sid)Atomic weight of Ge is larger than in SiCorrect answer is option 'B'. Can you explain this answer?.
Solutions for at room temperature intrinsic carrier concentration is higher in germanium than in silicon because __________.a)Carrier mobilities are higher Ge than in Sib)energy gap in Ge is smaller than that in Sic)Atomic number of Ge is larger than in Sid)Atomic weight of Ge is larger than in SiCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electrical Engineering (EE).
Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free.
Here you can find the meaning of at room temperature intrinsic carrier concentration is higher in germanium than in silicon because __________.a)Carrier mobilities are higher Ge than in Sib)energy gap in Ge is smaller than that in Sic)Atomic number of Ge is larger than in Sid)Atomic weight of Ge is larger than in SiCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
at room temperature intrinsic carrier concentration is higher in germanium than in silicon because __________.a)Carrier mobilities are higher Ge than in Sib)energy gap in Ge is smaller than that in Sic)Atomic number of Ge is larger than in Sid)Atomic weight of Ge is larger than in SiCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for at room temperature intrinsic carrier concentration is higher in germanium than in silicon because __________.a)Carrier mobilities are higher Ge than in Sib)energy gap in Ge is smaller than that in Sic)Atomic number of Ge is larger than in Sid)Atomic weight of Ge is larger than in SiCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of at room temperature intrinsic carrier concentration is higher in germanium than in silicon because __________.a)Carrier mobilities are higher Ge than in Sib)energy gap in Ge is smaller than that in Sic)Atomic number of Ge is larger than in Sid)Atomic weight of Ge is larger than in SiCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice at room temperature intrinsic carrier concentration is higher in germanium than in silicon because __________.a)Carrier mobilities are higher Ge than in Sib)energy gap in Ge is smaller than that in Sic)Atomic number of Ge is larger than in Sid)Atomic weight of Ge is larger than in SiCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Electrical Engineering (EE) tests.
|
|
Explore Courses for Electrical Engineering (EE) exam
|
|
Suggested Free Tests
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 to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup