R = rho L / A

  1. jcsd
  2. Simon Bridge

    Simon Bridge 15,261
    Science Advisor
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    Gold Member

    That sounds right - it only works for a nice geometry.

    consider a rectangular plate LxWxT dimensions (length x width x thickness)
    the resistance between opposite corners won't be ##\rho L/WT##

    Even if I attach the wires to the center of areas WxT, imagine W=T=1000m ... how does the current travel through the resistor then?
     
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