
81
we choose to regard as the reference point, or zero potential, with
respect to which all other voltages are reckoned, is the appropriate
centre, and we can mark it with a circle or stick a pin through it to
serve as an axis.
5.11 Current Phasors
Attempts to extend subscript notation to currents usually run into
trouble, because people write 7
cd
to mean the current flowing from c
to d. But whereas there can be only one voltage at a time between two
points, there can be as many currents as there are parallel paths. This
difficulty can be avoided by labelling the meshes or loops of the
circuit. There are excellent theoretical reasons for doin ...