Question

the band theory of solids explains satisfactorily the nature of?
1. electric insulator alone
2. electrical conductors alon
3. all of the above
4. electrical semiconductor alone
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Answer 1

Answer:

Band theory, in solid-state physics, theoretical model describing the states of electrons, in solid materials, that can have values of energy only within certain specific ranges. The behaviour of an electron in a solid (and hence its energy) is related to the behaviour of all other particles around it.

Hope it helps

Answer 2

Answer:

The nature of semiconductors, insulators, and conductors is explained by band theory. Option 3. is correct.

Explanation:

• Solid band theory describes the state of quantum electron taking up the inside of solid metal.
• Each molecule has different levels of energy.
• The way electrons behave within a molecule is best explained by band theory.

In this theory, three types of bands are described namely conduction band, valence band, and forbidden band.

In forbidden band, the electrical conductivity of a solid object is determined in the unrestricted space and the separation of materials such as conductors, semiconductors, and insulators.

So, band theory explains the nature of semiconductors, insulators, and conductors.

Option 3. is correct.