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How does a semiconductor differ from a onductor or an

Problem 14RQ Chapter 22

Conceptual Physics | 12th Edition

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Problem 14RQ

How does a ?semiconductor? differ from a ? onductor? or an? nsulator?

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Solution 14RQ Insulator: Insulators are materials through which electricity cannot pass through it.the valence band of these materials are always full and conduction band is remains empty.the forbidden energy gap between the valence band and conduction band is widest.the difference is more than 10 ev.crossing the energy gap from valence band to conduction band require more energy. Conductors: Conductors are material through which electricity can easily pass through it.the valence band and conduction band are overlap each other.there is no forbidden energy gap here because energy gap E = 0.gt absolute zero temperature large number of electrons remains in conduction band.the resistance of conductor is very low,so a large number of charge...

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