ABSTRACT
A capacitor is a system of two conducting electrodes, having equal and opposite charges separated by a dielectric. The capacitance
C
of this system is equal to the ratio of the absolute value of the charge
Q
to the absolute value of the voltage between bodies as:
(9.1)
where
C
= Capacitance in farad (F)
Q
= Charge in coulomb (C)
V
= Voltage (V)
The unit of capacitance, the farad, is a large unit; practical capacitors have capacitances in mirofarads (
m
F or 10
F), nanofarads (nF or 10
F), and picofarads (pF or 10
F). The unit conversions are shown in Table 9.1.
