Ten questions. The result tells you which lessons you may skip.
A capacitor holds \(6\,\mu\text{C}\) at \(300\,\text{V}\). At \(100\,\text{V}\) it holds
Two plates of area \(100\,\text{cm}^2\) stand \(2\,\text{mm}\) apart in air. With \(\varepsilon_0\) \(= 8.85 \times 10^{-12}\,\text{C}^2/(\text{N m}^2)\), the capacitance is
An isolated metal sphere of radius \(18\,\text{cm}\) has a capacitance, with \(k\) \(= 9 \times 10^9\,\text{N m}^2/\text{C}^2\), of
A \(10\,\mu\text{F}\) capacitor is charged by a \(100\,\text{V}\) battery. The energy stored, and the work done by the battery, are
A charged capacitor is disconnected from its battery and its plates are pulled apart. Which stays the same?
Capacitors of \(3\,\mu\text{F}\) and \(6\,\mu\text{F}\) in series are joined across \(90\,\text{V}\). The voltage across the \(3\,\mu\text{F}\) is
A \(4\,\mu\text{F}\) capacitor at \(100\,\text{V}\) is joined plate to plate with an uncharged \(4\,\mu\text{F}\). The fraction of the stored energy lost is
A slab of \(K = 4\) fills the gap of a capacitor that stays connected to its battery. The charge on the plates
A metal slab half as thick as the gap is put in an air capacitor of capacitance \(C_0\). The new capacitance is
Two dielectrics \(K_1\) and \(K_2\) are stacked, each filling half the gap over the whole area. They act as