Electric capacity Capacitors - Extra Know

### Electric capacity Capacitors

Electrical capacity is a measure of the ability of bodies to accumulate charges.
The capacity of a single conductor is defined as the ratio of the charge accumulated on the conductor to the potential of this conductor, provided the conductor is removed to a considerable (infinite) distance from other bodies. (In this case, the potential of the field at infinity is taken as zero)
C = \ frac {Q} {\ varphi} C =
φ
Q
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A capacitor is a technical device consisting of two conductors, in which the field arising when the conductors are charged with equal opposite charges is almost completely concentrated inside this device.
So the capacitor is depicted in the diagram:
The plates of a capacitor entering a circuit always have an equal and opposite charge.
The conductors that make up the pair are called capacitor plates.
There are designs of capacitors consisting of several pairs of plates.
The capacitance of a capacitor is defined as the ratio of the charge of the capacitor to the potential difference (voltage) between the plates
C = \ frac {q} {U} C =
U
q
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The unit for measuring capacitance in the SI system is the farad (F). 1 farad is equal to the capacitance of a capacitor, in which the charge 1 pendant creates a voltage of 1 volt between its plates.