Physics (A-level)/Capacitors and exponential decay
Capacitance
[edit | edit source]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
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