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Physics / Engineering

by @ 3:22 pm on January 24, 2010.

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3 Responses to “Physics / Engineering”

  1. Manoj says:

    You are spreading the Best Knowledge by books
    Thanks a lot.

  2. kamal says:

    i want 2 know that”does a p-tye semi conductor pocess positive charge?if so why?/if not so why?
    can u please tell me the cler idea with correct explanation.

    • bhavya says:

      a p type semiconductor is definitely not positively charged.
      the “p ” character is due the fact that it is “doped” with an electron deficient impurity which is usually trivalent. Now since Si can form only four bonds at a time, the electron deficient impurity now has a vacant position in its valence shell which provides a vacancy (aka a “hole”) that behaves as an “apparent positive charge” though its merely a vacancy and not a particle.
      hence the semiconductor remains neutral

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