Why do impurities not affect the resistivity of insulators

Reference no: EM131352756

1. What effect does an applied electric field have on an insulator?

2. Experimentally the addition of impurities to metals increases their resistivity, but the addition of impurities to semiconductors decreases their resistivity. Explain. Many insulators, however, are not very pure. Why do impurities not affect the resistivity of insulators?

Reference no: EM131352756

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