# Fundamentals of Physics Study Set 2

Physics & Astronomy

## Quiz 41 :Conduction of Electricity in Solids

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The Fermi-Dirac probability function P(E)varies between:
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Multiple Choice

A

We classify solids electrically according to three basic properties.What are they?
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D

The number density n of conduction electrons, the resistivity , and the temperature coefficient of resistivity α are given below for five materials.Which is a semiconductor?
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D

A certain material has a resistivity of 7.8 103 m at room temperature, and its resistivity increases as the temperature is raised by 100C.The material is most likely:
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A certain material has a resistivity of 7.8 103 m at room temperature, and its resistivity decreases as the temperature is raised by 100C.The material is most likely:
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A certain material has a resistivity of 7.8 10-8 m at room temperature, and its resistivity increases as the temperature is raised by 100C.The material is most likely:
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Which one of the following statements concerning electron energy bands in solids is true?
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If E0 and ET are the average energies of the "free" electrons in a metal at 0 K and room temperature respectively, then the ratio ET/E0 is approximately:
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The density of states for a metal depends primarily on:
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The Fermi energy of a metal depends primarily on:
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The energy gap between the valence and conduction bands of an insulator is of the order:
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The energy level diagram shown applies to:
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Electrons in a full band do not contribute to the current when an electric field exists in a solid because:
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The energy level diagram shown applies to:
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In a metal at 0 K, the Fermi energy is:
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The speed of an electron with energy equal to the Fermi energy for copper is on the order of:
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