) The conductors may be so charged by connecting them to the
two terminals of a battery Q is called the charge of the capacitor, though
this, in fact, is the charge on one of the conductors – the total charge  of
the capacitor  is zero The electric field in the region between the
conductors is proportional to the charge Q That
is, if the charge on the capacitor is, say  doubled,
the electric field will also be doubled at every point