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<p>
This
circuit is a simple model of a transmission line.<span style="mso-spacerun:
yes"> </span>A pulse propagates down the length of the ladder like a
wave.<span style="mso-spacerun: yes"> </span>The resistor at the end has
a value equal to the characteristic impedance of the ladder (determined by the
ratio of L to C), which causes the wave to be absorbed.<span
style="mso-spacerun: yes"> </span>A larger resistance or an open circuit
will cause the wave to be reflected; a smaller resistance or a short will cause
the wave to be reflected negatively.</span><b><span style="mso-spacerun:
yes"> </span></b><span style='font-weight:normal'>See the Feynman
Lectures 22-6, 7.</span><b><o:p></o:p></b></p>
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