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))_`
B
`(E_(g))_ lt (E_(g))_(Ge) lt (E_(g))_(Si)`
C
`(E_(g))_ gt (E_(g))_(Si) gt (E_(g))_(Ge)`
D
`(E_(g))_ =(E_(g))_(Si) =(E_(g))_(Ge)`
Text Solution
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The energy band gap is maximum for carbon, less for silicon and least for germanium out of the given three elements. Hence
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