1 A
parallel plate
capacitor C, as part of
a circuit through
which a time
dependent current
i (t) flows,  (a) a loop of
radius r, to determine
magnetic field at a
point P on the loop;
(b) a pot-shaped
surface passing
through the interior
between the capacitor
plates with the loop
shown in (a) as its
rim; (c) a tiffin-
shaped surface with
the circular loop as
its rim and a flat
circular bottom S
between the capacitor
plates The arrows
show uniform electric
field between the
capacitor plates Rationalised 2023-24
Physics
204
charges, but also the time rate of change of electric field More
precisely, the total current i is the sum of the conduction current
denoted by ic, and the displacement current denoted by id (= e0 (dFE/
dt))