For a distance time graph, in order to get the instantaneous speed, I have to use a gradient. While for a non ohmic conductor, to find the resistance st s point I just use the formula R=V/I. Why is it so that I need not get the gradient at they particular point to find the resistance st that point whilst for the instantaneous speed, I have to use a gradient at that point?(adsbygoogle = window.adsbygoogle || []).push({});

Thanks so much for the help!

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Non ohmic graph and distance vs time graph

**Physics Forums | Science Articles, Homework Help, Discussion**