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In a semiconductor, (i)there are no fr...

In a semiconductor,
(i)there are no free elctrons at `0K`
(ii) there are no free elctrons at any tempreture
(iii) the number of free electrons increases with tempreture
(iv) the number of free electrons is less than that in a conductor

A

`(i),(ii)`

B

`(i),(iii),(iv)`

C

`(ii),(iii)`

D

`(ii),(iv)`

Text Solution

Verified by Experts

The correct Answer is:
B
NA
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Knowledge Check

  • In diamond, the number of free electrons are:

    A
    1
    B
    2
    C
    0
    D
    4

  • The number of free electrons is Si at normal temperature is

    A
    `2.5xx10^(6) "per cm"^(3)`
    B
    `1.5xx10^(10) "per cm"^(3)`
    C
    `1.5xx10^(13) "per cm"^(3)`
    D
    `2.5xx10^(13) "per cm"^(3)`

  • In a semiconductor, free electron desnity is about

    A
    `10^(6)//m^(3)`
    B
    `10^(17)//m^(3)`
    C
    `10^(27)//m^(3)`
    D
    `10^(23)//m^(3)`

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    The number of free electrons in the outermost shell of carbon in graphite is :

    Number of free electron(s) in each carbon atom in graphite is/are

    The relation between number of free electrons (n) in a semiconductor and temperature (T) is given by

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