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Homework Help: Thermocouple-Uses and how it Works?

  1. Jan 11, 2008 #1
    Thermocouple-Uses and how it Works???

    1. The problem statement, all variables and given/known data
    I need to investigate how current in a diode varies with extreme temperatures. I have no idea how to do this but could a thermocouple somehow be incorporated into the investigation.

    2. Relevant equations
    Can a thermocouple be used to investigate this

    3. The attempt at a solution
    I have no idea how a thermocouple works or what it exactly does, so i have no attempted solutions.
  2. jcsd
  3. Jan 11, 2008 #2


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    Science Advisor
    Homework Helper

    Not sure what you mean by looking at the current in the diode.
    An intersting (and useful) property of diodes is that the forward voltage drop depends on temperature - this is used as a temperature sensor.

    It doesn't really matter what you use as a sensor to make your measurements, thermocouples have the advantage that they are fairly small and so can be easily attached to a diode. You will need a thermocouple reader - some digital voltmeters have them built in.
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