The electrical network shown in Figurefig21 is given.
It is desired to find the potentials at junctions (1) through (6)
for several values of V . The
potential applied between A and B is V volts. Denoting the potentials
by 
, application of Ohm's Law and Kirchhoff's
Current Law yield the following set of linear equations for the 
:
Figure 1.1: Circuit for Exercise 5.