Concentric spherical shells#

Concentric conducting spherical shells carry charges of $$Q$$ and $$-Q$$ as shown in the figure. The inner shell of radius $$a$$ has negligible thickness. The outer shell has an inner radius $$b$$.

Question Text#

Find an expression for the potential difference between the shells. In your expression, use Coulomb’s constant $$k$$ to represent $$1/(4\pi\varepsilon_0)$$.