# 11.3 Capacitance

Capacitors are electrical components used in circuits requiring timing or smoothing. They store charge, which is then released at a rate that can be controlled.First let us consider a charged metal sphere (here shown in glorious two dimensions on screen):The potential on the surface of the sphere is given by the equation:$$V={1\over4\pi\varepsilon_0}{Q\over r}$$Notice that $$V\propto Q$$. The ratio of charge to potential is called the capacitance of the...

To access the entire contents of this site, you need to log in or subscribe to it.

Click the free stuff button on the home page to access free pages or check the blog (which is also free)

All materials on this website are for the exclusive use of teachers and students at subscribing schools for the period of their subscription. Any unauthorised copying or posting of materials on other websites is an infringement of our copyright and could result in your account being blocked and legal action being taken against you.