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In a semiconductor, the forbidden energy gap between the valance band and the conduction band is of the order of
- a)1 ev
- b)1 MeV
- c)5 eV
- d)1 GeV
Correct answer is option 'A'. Can you explain this answer?
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In a semiconductor, the forbidden energy gap between the valance band ...
Explanation:The material which has electrical conductivity between that of a conductor and an insulator is called as semiconductor. Silicon, germanium and graphite are some examples of semiconductors.
In semiconductors, the forbidden gap between valence band and conduction band is very small. It has a forbidden gap of about 1 electron volt (eV).
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In a semiconductor, the forbidden energy gap between the valance band ...
The Forbidden Energy Gap in a Semiconductor
The forbidden energy gap, also known as the band gap, is an essential concept in semiconductor physics. It refers to the energy difference between the valence band (VB) and the conduction band (CB) in a solid material. This gap determines the electrical conductivity and other properties of the material.
Explanation:
1. Valence Band (VB):
The valence band is the highest energy band in a solid material that is fully occupied by electrons at absolute zero temperature (0 K). The electrons in this band are bound to their respective atoms and have no mobility. The valence band represents the energy levels occupied by the valence electrons of the atoms in the material.
2. Conduction Band (CB):
The conduction band is the energy band immediately above the valence band. It contains vacant energy states that electrons can occupy and move freely within the material. Electrons in the conduction band have enough energy to move through the material and contribute to its electrical conductivity.
3. Forbidden Energy Gap:
The forbidden energy gap, denoted as Eg, is the energy difference between the valence band and the conduction band. It represents the energy required for an electron in the valence band to jump to the conduction band and become free to move as a charge carrier.
4. Semiconductor:
A semiconductor is a type of material that has a smaller forbidden energy gap compared to insulators but larger than conductors. It exhibits intermediate electrical conductivity, making it suitable for various electronic applications.
5. Order of Forbidden Energy Gap:
The forbidden energy gap in a semiconductor is typically of the order of 1 eV (electron-volt). An electron-volt is a unit of energy equal to the energy gained or lost by an electron when it is accelerated through a potential difference of 1 volt.
Conclusion:
In conclusion, the forbidden energy gap between the valence band and the conduction band in a semiconductor is typically of the order of 1 eV. This energy gap determines the conductivity and other properties of the semiconductor material.
The forbidden energy gap, also known as the band gap, is an essential concept in semiconductor physics. It refers to the energy difference between the valence band (VB) and the conduction band (CB) in a solid material. This gap determines the electrical conductivity and other properties of the material.
Explanation:
1. Valence Band (VB):
The valence band is the highest energy band in a solid material that is fully occupied by electrons at absolute zero temperature (0 K). The electrons in this band are bound to their respective atoms and have no mobility. The valence band represents the energy levels occupied by the valence electrons of the atoms in the material.
2. Conduction Band (CB):
The conduction band is the energy band immediately above the valence band. It contains vacant energy states that electrons can occupy and move freely within the material. Electrons in the conduction band have enough energy to move through the material and contribute to its electrical conductivity.
3. Forbidden Energy Gap:
The forbidden energy gap, denoted as Eg, is the energy difference between the valence band and the conduction band. It represents the energy required for an electron in the valence band to jump to the conduction band and become free to move as a charge carrier.
4. Semiconductor:
A semiconductor is a type of material that has a smaller forbidden energy gap compared to insulators but larger than conductors. It exhibits intermediate electrical conductivity, making it suitable for various electronic applications.
5. Order of Forbidden Energy Gap:
The forbidden energy gap in a semiconductor is typically of the order of 1 eV (electron-volt). An electron-volt is a unit of energy equal to the energy gained or lost by an electron when it is accelerated through a potential difference of 1 volt.
Conclusion:
In conclusion, the forbidden energy gap between the valence band and the conduction band in a semiconductor is typically of the order of 1 eV. This energy gap determines the conductivity and other properties of the semiconductor material.
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In a semiconductor, the forbidden energy gap between the valance band and the conduction band is of the order ofa)1 evb)1 MeVc)5 eVd)1 GeVCorrect answer is option 'A'. Can you explain this answer?
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