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Homework Help: (Solid State) low resistivity dependance on temperature

  1. Mar 12, 2015 #1


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    1. The problem statement, all variables and given/known data
    For some applications it is important to minimize the temperature dependence of electronic components. For example, there is a special alloy called constantan that can be used for temperature independent resistance elements. Do you expect constantan to have a high or low density of lattice defects? Justify your answer.

    2. Relevant equations

    3. The attempt at a solution
    so i assume it has low density of lattice defects because if resistance remains constant then scattering time is also constant which means that there are no defects for the electron to scatter off of. would this statement be correct?

    thank you for any advice you can give me
  2. jcsd
  3. Mar 12, 2015 #2


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    Staff: Mentor

    Certainly the resistivity depends on defect density, but how is Constantan made? Why does it have a low coefficient of resistivity?
  4. Mar 12, 2015 #3


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    well i know constantan is an alloy of copper and nickel which I guess have fairly small nuclei which which increases scattering time and decreases resistivity. I'm not sure I fully understood what you're asking though
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