Suresh Ramasubramanian wrote:
> sreangsu acharyya rearranged electrons thusly:
> > dont we need a capacitance rather than inductance to ground surge.
rather, to "soften" the surge, not "ground".
> > I guess that depends whether its the voltage or the current which
> > kills a modem. A high enough inductance should cause the voltage to drop
> > before the modem. Whereas the capacitor should take out the surge
> > component of the current. Have to redo the physics book ;(
ligtning is very-high "voltage" and relatively low (in relation to the
voltage) curent.
> What do the knots do, then?
the knots add inductors in series, which increase the total inductance
in the line. higher the inductance, more the resistance.
> As the wire becomes noticeably thicker at the
> knots, it's a kind of primitive fuse, perhaps?
its not a fuse, its an obstruction. it won't blow off itself to save
devices on the line, rather it would present a very high resistance to
the surge (voltage/curent).
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