Such an arrangement is called a capacitor. The ratio of charge to potential difference is called the capacitance C of this capacitor: C=q/V.
A capacitor is an electrical energy storage device that consists of two conductors that are isolated from one another and placed near to one another. A straightforward illustration of one such storage device is a parallel-plate capacitor.
The International System of Units' (ISO) standard unit of capacitance is the farad (F) (SI). It denotes a substance's capacity to store an electric charge. Most electrical capacitors are measured in farads, microfarads (F), or nanofarads to express their value (nF).
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