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Carbon , silicon and germanium have four...

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)_C = (E_g)_"Si"`

B

`(E_g)_C lt (E_g)_"Ge"`

C

`(E_g)_C gt (E_g)_"Si"`

D

`(E_g)_C lt (E_g)_"Si"`

Text Solution

Verified by Experts

The correct Answer is:
C
Carbon , silicon and germanium all are semiconductors and `(E_g)_"Si" gt (E_g)_"Ge"`.
But `(E_g)_C` is very high and `(E_g)_C gt (E_g)_"Si" gt (E_g)_"Ge"`.
`therefore (E_g)_C gt (E_g)_"Si"` is the correct choice.
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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 which of the following statement is true (a) (E_(g))_(Si)lt(E_(g))_(Ge)lt(E_(g))_(c ) (b) (E_(g))_(c )lt(E_(g))_(Gelt(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)

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