Band picture of a semiconductor at room temperature (valence and conduction bands)

1. A.
   the valence band is completely filled.
2. B.
   the conduction band is completely empty.
3. C.
   the conduction band is partially filled and the valence band is partially empty.
4. D.
   the valence band is completely filled and conduction band is partially empty.

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1. A.
   the valence band is completely filled and the conduction band partially filled.
2. B.
   the valence band is completely filled.
3. C.
   the conduction band is completely filled.
4. D.
   the valence band is partially empty and the conduction band partially filled.

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1. A.
   the valence band is completely filled.
2. B.
   the conduction band is completely filled.
3. C.
   the conduction band is partially filled and valence band is partially empty.
4. D.
   the valence band is completely filled and the conduction band is partially filled.

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1. A.
   valance band is partially empty and the conduction band is partially filled.
2. B.
   valance band is completely filled and the conduction band is partially filled.
3. C.
   valance band is completely filled.
4. D.
   conduction band is completely empty.

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