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Please,please help me - Electronic devices - NEET

In an unbiased p-n junction, holes diffues from the p- region to n-region because of

  • Option 1)

    the potential differnce across the p-n junction.

  • Option 2)

    the attracttion of free electrons of n-region

  • Option 3)

    the higher hole concentration in p-region than that in n-region

  • Option 4)

    the higher concentration of electrons in the n-region than that in the p-region

 
Answers (1)
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S subam

 

Intrinsic semiconductor -

It is a pure semiconductor

e.g. pure Ge, or Pure Si 

- wherein

low conductivity

ne = nh

 

 hole will diffuse from higher concentration region to lower concentration region to concentration region i.efropm p to n.

 


Option 1)

the potential differnce across the p-n junction.

This option is incorrect

Option 2)

the attracttion of free electrons of n-region

This option is incorrect

Option 3)

the higher hole concentration in p-region than that in n-region

This option is correct

Option 4)

the higher concentration of electrons in the n-region than that in the p-region

This option is incorrect

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