Which of the following is characteristic of metals? Which of the following is characteristic of insulators?...

Which of the following is characteristic of metals?

Which of the following is characteristic of insulators?

Which of the following is characteristic of semiconductors?

Match each of the following answers:

Large number of carriers independent of temperature, and low electron mobility that decreases with increasing temperature.

Intermediate number of carriers independent of temperature, and high electron mobility that decreases with increasing temperature

Near zero conductors, no real mobility estimates and near zero conductivity.

None of the above.

Solutions

Expert Solution

Metals : Large number of carriers independent of temperature, and low electron mobility that decreases with increasing temperature.

[Conductivity in metals is due to free electrons. At high temperature the molecular vibrations increases which hinder the free flow of electrons. So, conductivity decreases with temperature in metals]

Insulators: Near zero conductors, no real mobility estimates and near zero conductivity.

Semiconductors: None of the above

[The electrons from valence band cross over to conduction band with temperature increase. The number of charge carriers thus increase with temperature. So conductivity increases with increasing temperature in semiconductors.]

queen_honey_blossom answered 1 year ago

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