Question

The difference between an insulator and a semiconductor is

  Wider forbidden gap

The number of free electrons

The atomic structure

all the above

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Answer 1

Answer:

A semiconductor allows very low charge particles to move from valence band to conduction band. In insulators, there is no flow of charge particles under the influence of electric field hence insulators are the bad conductor of electricity.

The no. of free electrons

Answer 2

Option D) All of the above are differences between an insulator and a semiconductor.

• The forbidden gap is wider in insulators which makes it difficult for electrons to travel from the lower band to the higher band. In semiconductors, the forbidden gap is small and makes it easier for electrons to jump from a lower to a higher band.
• The number of free electrons in insulators is comparatively lesser as compared to a semiconductor. The fewer the number of free electrons, the lesser is the flow of current.
• The atomic structure of insulators is more stable and has fewer electrons in the last orbital as compared to semi-conductors or conductors.
• Hence all the above is the answer.