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In a semiconducting material the mobilit...

In a semiconducting material the mobilities of electrons and holes are `mu_(e)` and `mu_(h)` respectively. Which of the following is true?

A

`mu_(e) gt mu_(h)`

B

`mu_(e) lt mu_(h)`

C

`mu_(e)=mu_(h)`

D

`mu_(e) lt 0 , mu_(h) gt 0`

Text Solution

Verified by Experts

The correct Answer is:
A
Because electrons needed less energy to move.
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Knowledge Check

  • In a semiconducting material, the mobilities of electrons and holes are mu_(e) and mu_(h) respectively. Then

    A
    `mu_(e) lt mu_(h)`
    B
    `mu_(e) = mu_(h)`
    C
    `mu_(e) lt mu_(h)`
    D
    `mu_(e) gt 0` but `mu_(h) lt 1 `

  • If the relative permittivity and permeability of a given material are epsilon_(r ) and mu_(r) , respectively then, which among the following is correct for a diamagnetic material?

    A
    `epsilon_(r) 1.5 , mu_(r ) = 1.5`
    B
    `epsilon_(r) 0.5 , mu_(r ) = 1.5`
    C
    `epsilon_(r) 1.5 , mu_(r ) = 0.5`
    D
    `epsilon_(r) 0.5 , mu_(r ) = 0.5`

  • Relative permittivity and permeability of a material are epsilon_(r) and mu_(r) respectively which of the following values of these quantities are allowed for a diamagnetic material ?

    A
    `epsilon=0.5 , mu_(r )=0.5`
    B
    `epsilon_(r )=1.5 ,mu_(r )=0.5`
    C
    `epsilon_(r )=0.5 mu_(r )=1.5`
    D
    `epsilon_(r )=1.5 mu_(r )=1.5`

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