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Silicon is a semiconductor. If a small a...

Silicon is a semiconductor. If a small amount of As is added to it, then its electrical conductivity

A

Decreases

B

Increases

C

Remains unchanged

D

Becomes zero

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • If a small amount of antimony is added to germanium crystal

    A
    the antimony becomes an acceptor atom
    B
    there will be more free electrons than holes in the semiconductor
    C
    its resistance is increased
    D
    it becomes a `p`-type semiconductor

  • If a small amount of antimony is added to germanium crystal

    A
    Its resistance is increased
    B
    It becomes a p-type semiconductor
    C
    The antimony becomes an acceptor atom
    D
    There will be more free electrons than holes in the semiconductor

  • Small amount of iodine is added to common salt to that

    A
    Oedema is prevented
    B
    Common salt is utilised properly in the body
    C
    Occurance of goitre is prevented
    D
    Kidney remains efficient in maintaining water balance