11.3 Capacitance

IB Physics: 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...


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