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Resistance from V-I graph

  1. Jul 20, 2017 #1
    1. The problem statement, all variables and given/known data
    Is the resistance equal to V/I at any point, or is it the gradient at that point? And Why?

    2. Relevant equations


    3. The attempt at a solution
    shouldn't it be the gradient? because it is change in V over change in I?

    Thanks~
     
  2. jcsd
  3. Jul 20, 2017 #2

    cnh1995

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    Homework Helper

    Yes, it's the gradient. But for ohmic materials (linear resistances), the gradient is same as V/I.
    Can you say why?
     
  4. Jul 20, 2017 #3
    Yes =) Thanks for making it clear :blushing:
     
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