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Solution - Electrical Properties - Applications of N-type and P-type Semiconductors

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Question

(a) What type of semiconductor is obtained when silicon is doped with boron? 

 

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When a hole is produced in P-type semiconductor, there is _______.

(A) extra electron in valence band.

(B) extra electron in conduction band.

(C) missing electron in valence band.

(D) missing electron in conduction band.

 

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p - type semi-conductors are made by mixing silicon with impurities of-

  1. germanium
  2. boron
  3. arsenic  
  4. antimony
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In a semiconductor, acceptor impurity is.................................

  1. antimony
  2. indium
  3. phosphorous
  4. arsenic
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To prepare n-type semiconductor the impurity to be added to silicon should have the following number of valence electrons:

(a) 2

(b) 3

(c) 4

(d) 5

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