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That property of a system of conductors and dielectric, which permits the storage of electricity when potential difference exists between the conductors. Its value is expressed as the ratio of a quantity of electricity to a potential difference. A capacitance value is always positive. The charge which must be communicated to the body to raise its potential one unit, represented by C= Q/V, where C is the capacitance, Q the quantity of charge, and V the potential. Capacitance is a measurement of a cable's ability to store an electrical charge, and is expressed in picofarads per foot (pF/ft). Capacitance is especially important in any situation where large amounts of data are being transmitted thru the cable. The higher the capacitance of cable, the more it interferes with high frequency signals.
The
property
of a
device
to
oppose
changes
in
voltage
due to
energy
stored
in its
electrostatic
field.
Capacitor
A device
whose
impedance
increases
with
decreasing
frequency.
Also
known as
a "cap";
commonly
used in
passive
crossovers
as a
high
pass
device.
Can also
be used
to store
energy.
Crossover
See
Active
Crossover
&
Passive
Crossover
Conductor
A
material
that
allows
electrical
current
to flow
through
it
easily. |
