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Carbon, silicon and germanium have four ...

Carbon, silicon and germanium have four valence electrons each. These are characterised by valence and conduction bands separated by energy band gap respectively equal to `(E_g)_C, (E_g)_(Si), and (E_g)_(Ge)`. Which of the following statements is true?

A

`(E_(g))_(s i) lt (E_(g) )_(ge) lt (E_(g))_C `

B

`(E_g )_C lt (E_g)_(Ge) gt (E_G)_(s i)`

C

`(E_g )_c gt (E_G )_(si ) gt E_(g) _( G e)`

D

`(E_(g))_C = (E_g)_(s i) =(E_(g))_(Ge)`

Text Solution

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The correct Answer is:
C
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Carbon , silicon and germanium have four valence elcectrons each . These are characterised by valence and conduction bands separated by energy band - gap respectively equal to (E_g)_(c) (E_g)_(si) and (E_g)_(Ge) . Which of the following statements ture ?

Carbon , silicon and germanium have four valence elcectrons each . These are characterised by valence and conduction bands separated by energy band - gap respectively equal to (E_g)_(c) (E_g)_(si) and (E_g)_(Ge) . Which of the following statements ture ?

Knowledge Check

  • Carbon , silicon and germanium have four valence elcectrons each . These are characterised by valence and conduction bands separated by energy band - gap respectively equal to (E_g)_(c) (E_g)_(si) and (E_g)_(Ge) . Which of the following statements ture ?

    A
    `(E_g)_(Si) lt (E_g)_(Ge) lt (E_g)_C`
    B
    `(E_g)_(C) lt (E_g)_(Ge) lt (E_g)_(Si)`
    C
    `(E_g)_(C) gt (E_g)_(Si) gt (E_g)_(Ge)`
    D
    `(E_g)_(C) = (E_g)_(Si) =(E_g)_(Ge)`

  • Which of the following equations correctly represents the temperature variation of energy gap between the conduction and valence bands for Si?

    A
    `E_g(T)=0.70-2.23xx10^(-4)` T eV
    B
    `E_g(T)=0.70+2.23xx10^(-4)` T eV
    C
    `E_g(T)=1.10-3.60xx10^(-4)` T eV
    D
    `E_g(T)=1.10+3.60xx10^(-4)` T eV

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