What is Capacitor? What is Capacitance?Published on 15/2/2014 & updated on 17/10/2018
CapacitanceNow we understand that the charge accumulation in the conductors (plates) causes the voltage or potential difference across the capacitor. The quantity of charge accumulated in the capacitor for developing a particular voltage across the capacitor is referred to as the charge holding capacity of the capacitor. We measure this charge accumulation capability of a capacitor in a unit called capacitance. The capacitance is the charge gets stored in a capacitor for developing 1 volt potential difference across it. Hence, there is a direct relationship between the charge and voltage of a capacitor. The charge accumulated in the capacitor is directly proportional to the voltage developed across the capacitor. Where Q is the charge and V is the voltage. Here C is the constant of proportionality, and this is capacitance,
The capacitance depends upon three physical factors, and these are the active area of the capacitor conductor (plates), the distance between the conductors (plates) and permittivity of the dielectric medium. Here, ε is permittivity of the dielectric medium, A is the active area of the plate and d is the perpendicular distance between the plates.
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