An insulator has?
Everyday Science / Physics — Multiple-choice practice
- A. Completely filled valence band
- B. None of these
- C. Half-filled valance band
- D. Empty valance band
Correct answer
Completely filled valence band
Explanation
Explanation An insulator has a c ompletely filled valence band. Explanation: In an insulator, all the valence electrons are tightly bound to their atoms and cannot move freely, resulting in a filled valence band. Since there are no electrons available in the conduction band, they cannot move to it and conduct electricity.
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