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In a p type material the Fermi level is 0.3 eV above valence band. The concentration of acceptor atoms is increased. The new position of Fermi level is likely to be
  • a)
    0.5 eV above valence band
  • b)
    0.28 eV above valence band
  • c)
    0.1 eV above valence band
  • d)
    below the valence band
Correct answer is option 'B'. Can you explain this answer?
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In a p type material the Fermi level is 0.3 eV above valence band. The...
Addition of acceptor atom brings Fermi level closer to valence band.
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In a p type material the Fermi level is 0.3 eV above valence band. The...
Explanation:
When acceptor atoms are added to a p-type material, they create holes in the valence band. The holes act as positive charge carriers. The concentration of acceptor atoms determines the number of holes in the material. As the concentration of acceptor atoms increases, the number of holes also increases.

Effect of increasing acceptor atoms on Fermi level:
The Fermi level is the energy level at which there is a 50% probability of finding an electron. In a p-type material, the Fermi level is closer to the valence band than the conduction band because there are more holes than electrons. When the concentration of acceptor atoms is increased, the number of holes increases, and the Fermi level moves closer to the valence band.

Answer to the question:
The question asks about the new position of the Fermi level after the concentration of acceptor atoms is increased. The original position of the Fermi level is 0.3 eV above the valence band. Since the concentration of acceptor atoms is increased, the Fermi level moves closer to the valence band. The correct answer is option 'B' which states that the new position of the Fermi level is 0.28 eV above the valence band. This is because the increased concentration of acceptor atoms creates more holes and pushes the Fermi level closer to the valence band.
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In a p type material the Fermi level is 0.3 eV above valence band. The...
But kaise 0.28
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In a p type material the Fermi level is 0.3 eV above valence band. The concentration of acceptor atoms is increased. The new position of Fermi level is likely to bea)0.5 eV above valence bandb)0.28 eV above valence bandc)0.1 eV above valence bandd)below the valence bandCorrect answer is option 'B'. Can you explain this answer?
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