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Does the resistance of strain gauge increase when temperature increases?

  1. Apr 28, 2008 #1
    Hello, could someone help on this question??
    ok, I'm trying to find out how much a piece of wood expands and contracts with changes in humidity and temperature, I'm sticking a strain gauge on the wood to detect the expansion and contraction of it. my question is if the temperature increase, which makes the wood expand, would the resistance of the strain gauge increase or decrease?? and why??

    Thank you
  2. jcsd
  3. Apr 28, 2008 #2
  4. Apr 28, 2008 #3
    thank you so much!!!
  5. Apr 28, 2008 #4
    You are welcome =) Google power is backing me up =P
  6. Apr 28, 2008 #5


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    Science Advisor

    Be careful. You will not be able to match a stain gauge material to wood. There will always be a difference in expansions between the gauge and the substrate that will induce error.
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