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18
th
Dec 2004
Capacitors Application
Edward Chen
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18
th
Dec 2004
Electrode Plates
Dielectric
The value of a capacitor is measured in farads. For 1 farad
of capacitance, 1 coulomb of charge is stored on the plates,
when 1 volt of force is applied.
1 farad = 1 coulomb / 1 volt
1 coulomb represents ~ 6 x 10
19
electrons
All capacitors utilize the same basic mechanism in their
structure
2
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18
th
Dec 2004
ESL - Inductive Reactance (X
L
)
opposes Capacitive Reactance
X
Z
ESR
X
C
X
L
X
0
Impedance is now a
factor of resultant
Z = (X
C
-X
L
) + ESR
2
2
3