Electronics and Communication Engineering - Electronic Devices and Circuits - Discussion


At room temperature the current in an intrinsic semiconductor is due to

[A]. holes
[B]. electrons
[C]. ions
[D]. holes and electrons

Answer: Option D


Intrinsic material has equal number of holes and electrons.

Sundar said: (Mar 19, 2014)  
An intrinsic semiconductor material is chemically very pure and possesses poor conductivity.

It has equal numbers of negative carriers (electrons) and positive carriers (holes).

A silicon crystal is different from an insulator because at any temperature above absolute zero temperature, there is a finite probability that an electron in the lattice will be knocked loose from its position, leaving behind an electron deficiency called a "hole".

Emam said: (Apr 21, 2014)  
Intrinsic semiconductor have equal no.of electrons and holes.

Sachin said: (Aug 31, 2016)  
An intrinsic semiconductor is a pure semiconductor which doesn't contain any impurity like trivalent or pentavalent, because of that the number of electron and holes are same. This is only responsible for the current.

Venkateshh said: (Mar 1, 2017)  
It has an equal number of electrons and holes.

M.Muthumari said: (Aug 21, 2017)  
Intrisic semiconductor has an equal number of electrons and holes. Intrinsic semiconductor also known as undoped semiconductor. When some impurity is added to an intrinsic semiconductor, extrinsic semiconductors can be produced. Intrinsic semiconductor example:silicon, germanium, gallium arsenide.

Kikku said: (Nov 16, 2017)  
Do intrinsic conduct at room temperature?

Jay said: (Feb 24, 2018)  

Only if electric filed is applied.

Bindukalyan said: (May 21, 2020)  
Does it conduct below room temperature?

Dany said: (Jun 3, 2020)  
Yes, it is due to Equal no of electrons and holes.

Sankar said: (Aug 13, 2021)  
Current is due to both electrons and holes. Initially intrinsic semiconductor acts as a insulator as temp rises conductivity increases is due both electrons and holes but current due to electrons is little bit more than holes why because electron have high mobility than holes.

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