What is meant by the terms electrical 'insulator' and 'semiconductor' ?
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An electrical insulator is a material in which electric current does not flow freely. ... Other materials—semiconductors and conductors—conduct electric current more easily. The property that distinguishes an insulator is its resistivity; insulators have higher resistivity than semiconductors or conductors.
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Semiconductors are the materials that have their conductivity between the conductors and the insulators. Insulators are the bad conductors of electricity or they do not conduct electric current through them. Conductors have very high conductivity (10-7 Ʊ /m), thus they can easily conduct electric current
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