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## Homework Statement

You have two concentric cylinders. The inner cylinder has radius a and the external cylinder has radius b. Find the electric potential in the region between the cylinders.

[Hint: The final equation takes the form V(r) = constant1 - constant2 ln(something) ]

## Homework Equations

I think:

Gauss's law: [itex]\Phi[/itex]=EA=q/ε

Coulomb's law: E=q/(4πεr^2)

## The Attempt at a Solution

I really don't know.