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silicon doped with electron rich imp...

silicon doped with electron rich impurity forms ………. .

A

p-type semicondutor

B

n-type semiconductor

C

intrinsic semiconductor

D

insulator

Text Solution

Verified by Experts

The correct Answer is:
B
When Si is doped with an eletron rich impurity, the resulting crystal have an extra electron, which makes the crystal conducting. Since an electron (Negative charge ) is responsible for the conductivity of crystal, it is called n-type semiconductor.
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Knowledge Check

  • Silicon dopend with electron-rich impurity forms…….

    A
    p-type semiconductor
    B
    n-type semiconductor
    C
    intrinsic semiconductor
    D
    insulator

  • A p-type semiconductor is (i) a silicon crystal doped with arsenic impurity (ii) a silicon crystal doped with aluminium impurity (iii) a germanium crystal doped with boron impurity (iv) a germanium crystal doped with phosphorus impurities.

    A
    (i) and (ii) are correct
    B
    (ii) and (iii) are correct
    C
    (i) and (iv) are correct
    D
    only (i) is correct

  • n type semiconductor is formed when trace amoutn of impurity is added to silicon. The numbe of elecrtons in the impurity atom must be

    A
    5
    B
    6
    C
    2
    D
    1

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    To make p type semiconductor pure silicon should be doped with the impurity atoms of

    Pure silicon doped with phosphorus is :

    Pure silicon doped with phosphorus is:

    Silicon doped with arsenic is an example of :

    The conductivity of intrinsic semiconductors can be increased by adding a suitable impurity . This process is called underline(A) . This can be done with an impurity which is Such impurities introduce underline(B) rich or deficient as compared to the semiconductor. Such impurities introduce underline(C) defects in them. Electron rich impurities result in D type semiconductors while electron deficit impurities result in E type semiconductors .

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