
90
(a) (b)
Fig. 6.9 Simplest capacitive circuit and corresponding phasor diagrams
compare with Fig. 5.11 let us draw the voltage phasor in the same
way, indicating that terminal b is at peak positive potential with
respect to a. At that moment, therefore, the voltage across C has just
stopped increasing and is about to decrease; so C is charged to the
maximum extent, positive on the upper plate. The current, which has
been flowing clockwise to deliver that charge, is now at zero and
about to discharge anticlockwise. The current phasor must therefore
be drawn horizontal, to signify zero current. And as anticlockwise
current, which our conventio ...