Copper Resistivity Temperature Dependence Quiz
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Questions and Answers

What does the solid line in Fig 2.10 represent?

  • Conduction electrons
  • Lattice vibrations
  • Thermal conductivity (correct)
  • Electrical conductivity
  • Which material has the highest electrical conductivity?

  • Mercury (Hg)
  • Gold (Au) (correct)
  • Aluminum (Al)
  • Steel (1080)
  • What is the relationship between thermal conductivity and electrical conductivity according to Fig 2.10?

  • They are inversely proportional (correct)
  • They have an exponential relationship
  • They are directly proportional
  • They are not related
  • Which metal/alloy has the lowest thermal conductivity?

    <p>Gold (Au)</p> Signup and view all the answers

    What is responsible for carrying thermal energy in metals, as mentioned in the text?

    <p>Conduction electrons</p> Signup and view all the answers

    In what type of materials do lattice vibrations play a significant role in heat conduction?

    <p>Insulators</p> Signup and view all the answers

    Which metal has the highest resistivity at room temperature?

    <p>Silver</p> Signup and view all the answers

    At what approximate temperature does nickel go through a magnetic to non-magnetic transformation?

    <p>1043 K</p> Signup and view all the answers

    What metal has a resistivity that decreases most significantly with increasing temperature?

    <p>Tin</p> Signup and view all the answers

    Which metal undergoes a magnetic to non-magnetic transformation at approximately 627 K?

    <p>Nickel</p> Signup and view all the answers

    What type of transformation does iron go through at approximately 1043 K?

    <p>Curie transformation</p> Signup and view all the answers

    Which metal has the highest resistivity among the listed metals?

    <p>Platinum</p> Signup and view all the answers

    What is the relationship between resistivity and temperature in copper above 100 K?

    <p>Directly proportional</p> Signup and view all the answers

    At low temperatures, what is the relationship between resistivity and temperature in copper?

    <p>Proportional to T^5</p> Signup and view all the answers

    What does the inset on the log-log plot below 100 K show about the relationship between resistivity and temperature?

    <p>Approaches the residual resistivity</p> Signup and view all the answers

    What temperature is near the melting point of copper mentioned in the text?

    <p>1358 K</p> Signup and view all the answers

    In what condition is the power radiated from a light bulb equal to the electrical power dissipated in the filament?

    <p>2408 °C</p> Signup and view all the answers

    What is the nature of metal conductivity discussed in the text?

    <p>Due to conduction electrons</p> Signup and view all the answers

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