Question

Write any two distinguishing features between conductors, semiconductors and insulators on the basis of energy band diagrams.

Answer 1

Difference between conductors, insulators and semiconductors is given below.

Explanation:

Conductors:

• The valence band is completely filled and conduction and have two possibilities either.
• It is partially filled and has extremely small energy gap between valence and conduction band.
• Conductors can conduct electricity on applying small electric filed.

Insulators:

• The energy gap between conduction and valance band is very large.

• When electric filed is applied the electrons find it difficult to get the energy.

• Conduction band continues to be empty.

• That is why no current flows through insulators.

Semiconductor:

• The energy band structure of semiconductor is similar to insulators.

• Energy gap is much smaller.

• Its conductivity lies between insulation and conduction band.

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