(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A material of resistivity p is formed into a solid, truncated cone of height

h and radii r_1 and r_2 at either end. Calculate the resistance of the cone

between the two flat ends.

You can find my awful sketch as a thumbnail.

2. Relevant equations

R=pL/A ,where p is resistivity.

3. The attempt at a solution

I know I need to calculate dR=(p*dy)/(pi*r^2). But I don't know what is r as a function of y.

**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!

# Need to determine resistance of an object

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