# Physics (A-level)/Capacitors and exponential decay

## Capacitance edit

A capacitor is a passive electrical component capable of storing electrical charge. This produces electrical potential energy. A capacitor consists of two conducting plates separated by an insulator.

Capacitance is defined as the charge stored per unit voltage, deriving the equation:

C=Q/V

Where C is the capacitance measured in Faradays(F), Q is the charge measured in Amps(A) and V is the voltage of potential difference measured in volts(V).

1F is very large value. More common magnitudes are: picofarads(pF), nanofarads(nF) and microfarads(μF). Micheal Faraday

## Links edit

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