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Earn 100
What is Conduction band?
Important Questions on Semiconductor Electronics: Materials, Devices and Simple Circuits
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The band gap in and in respectively is
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Which of the energy band diagrams shown in the figure corresponds to that of a semiconductor?
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Choose the correct statement. In conductors
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The bonding is germanium crystal (semiconductor) is
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What is the value of energy gap for metals?
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The scientific principle involved in 'Laser' is____
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A positive hole in a semiconductor is
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Explain 'Conduction band', 'Valence band' and 'Energy gap' in semiconductors.
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The energy band gap of semiconducting material to produce violet (wavelength ) LED is _____ . (Round off to the nearest integer).
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State anyone difference between the energy band diagram of conductors and that of insulators.
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State the conditions required to achieve laser action.
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Draw separate energy band diagrams for conductors, semi-conductors and insulators and label each of them.
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The band gaps of an insulator, conductor and semiconductor are respectively and The relationship between them is given as _____.
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Define semiconductor. Explain different types of semiconductor.
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What is NAND gate. Draw its symbol. Write truth table and draw its output single in wave form.
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What will be the effect of increasing the temperature on the conductivity of pure semiconductor?
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Match the List I with List II
| List I | List II | ||
| A | Intrinsic Semiconductor | I | Fermi-level near valence band |
| B | n-type semiconductor | II | Fermi-level at middle of valence and conduction band |
| C | p-type semiconductor | III | Fermi-level near conduction band |
| D | Metals | IV | Fermi-level inside conduction band |
Choose the correct answer from the options given below:
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The chromium ions doped in the ruby rod:
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Consider a situation in which reverse biased current of a particular junction increases when it is exposed to a light of wavelength During this process, enhancement in carrier concentration takes place due to generation of hole-electron pairs. The value of band gap is nearly.
