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Mobility of electrons in n -type Ge is 5...

Mobility of electrons in `n` -type Ge is `5000 cm^2V^-1 s^-1` and conductivity 5 mho/cm. If effect of holes is negligible, then impurity concentration is `k xx 10^(15) / cm^3`. Find `k`.

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Knowledge Check

  • Mobility of electron in N-type Ge is 5000 cm^(2)//"volt" sec and conductivity 5 "mho/cm" . If effect of holes is negligible then impurity concentration will be

    A
    `6.25xx10^(15)//cm^(3)`
    B
    `9.25xx10^(14)//cm^(3)`
    C
    `6xx10^(13)//cm^(3)`
    D
    `9xx10^(13)//cm^(3)`

  • Mobility of electrons in Germanium of N types & their conductivity are 3900 cm^2 /volt-sec & 5 mho/cm respectively. If effect of holes are negligible then concentration of impurity will be-

    A
    `8 xx 10^15 // cm^3`
    B
    `9.25 xx 10^14 //cm^3`
    C
    `6 xx 10^13 // cm^3`
    D
    `9 xx 10^13 // cm^3`

  • The electron mobility in N -type germanium is 3900cm^(2)//v-s and its conductivity is 6.24 mho//cm , then impurity concentration will be if the effect of cotters is negligible

    A
    `10^(15) cm^(3)`
    B
    `10^(13) //cm^(3)`
    C
    `10^(12) //cm^(3)`
    D
    `10^(16) //cm^(3)`