Faradic Brush.
A brush for application of electricity to the person. It is connected as
one of the electrodes of an induction coil or magneto generator. For
bristles wire of nickel plated copper is generally employed.
Faradization.
In medical electricity the analogue of galvanization; the effects due to
secondary or induced currents; galvanization referring to currents from
a galvanic battery; also the process of application of such currents.
Faults.
Sources of loss of current or of increased resistance or other troubles
in electric circuits.
Feeder.
A lead in an electric central station distribution system, which lead
runs from the station to some point in the district to supply current.
It is not used for any side connections, but runs direct to the point
where current is required, thus "feeding" the district directly. In the
two wire system a feeder may be positive or negative; in the three wire
system there is also a neutral feeder. Often the term feeder includes
the group of two or of three parallel lines.
Feeder Equalizer.
An adjustable resistance connected in circuit with a feeder at the
central station. The object of the feeder being to maintain a definite
potential difference at its termination, the resistance has to be varied
according to the current it is called on to carry.
Feeder, Main or Standard.
The main feeder of a district. The standard regulation of pressure
(potential difference between leads) in the district is often determined
by the pressure at the end of the feeder.
Feeder, Negative.
The lead or wire in a set of feeders, which is connected to the negative
terminal of the generator.
Feeder, Neutral.
In the three wire system the neutral wire in a set of feeders. It is
often made of less diameter than the positive and negative leads.
Feeder, Positive.
The lead or wire in a set of feeders, which wire is connected to the
positive terminal of the generator.
Ferranti Effect.
An effect as yet not definitely explained, observed in the mains of the
Deptford, Eng., alternating current plant. It is observed that the
potential difference between the members of a pair of mains rises or
increases with the distance the place of trial is from the station.
[Transcriber's note: This effect is due to the voltage drop across the
line inductance (due to charging current) being in phase with the
sending end voltages. Both capacitance and inductance are responsible
for producing this phenomenon. The effect is more pronounced in
underground cables and with very light loads.]