Calculating Resistance Across a Hollow Sphere

[raj01b]

Homework Statement

What is the resistance of a hollow sphere made of a material having resistivity p. Its internal radius is R1 & outer radius is R2 ?

Homework Equations

R=rho*l/A

The Attempt at a Solution

Here rho=p, l= R2-R1
have no clue, how to attempt the question.

 

[tiny-tim]

welcome to pf!

welcome to pf!

(have a rho: ρ and try using the X₂ icon just above the Reply box )

the question is asking for the resistance from the inner surface to the outer surface

find the area of the two surfaces, then treat it the same way as a trapezoid with the same top and bottom areas …

what do you get? ​