in the equations was replaced by a constant resistance. The
value of this resistance was changed until the peak value of
the calculated induced overvoltage agreed with the peak of
the induced overvoltage in curve 2 in Fig. 3(a) and (b). The
results for strike point P2 are shown in Fig. 6. The effective
resistance required to obtain this agreement was 0.36 /m.
Note that even though the peak values are equal there is a
significant difference between the risetime and the derivative
of the induced overvoltage. The results for strike point P1
are shown in Fig. 7. The effective resistance required to bring
the peak values of the two waveforms into agreement is 0.24
/m, which differs from the value we had to use in the case
where the strike point was P2. For comparative purposes, the
waveform obtained when the resistance is 0.36 /m (i.e., the
value corresponding to strike point P2 is also shown in the