44.
The relationship of charge (Q), capacitance (C), and voltage (E) is shown
by the basic formula:
Q = CE
45.
In what two ways are capacitors marked to indicate their capacity and working
voltage?
Q = CE
(1)
(2)
(1) Colored bands 46.
A capacitor can be charged by connecting it across a battery or other DC voltage
and/or dots.
source as in figure 2.
(2)
Letter-and-
number
designations.
Figure 2.
The positive pole of the battery pulls electrons from one plate of the capacitor (A),
causing this plate to have a deficiency of electrons (+ charge). The negative pole of the
battery forces electrons to flow to the other plate of the capacitor(B), causing this plate
to have an excess of electrons(-charge).
Electrons flow from the positive(+) plate of the capacitor (arrow A) and to the negative
(-) plate of the capacitor (arrow B), until the capacitor is charged to a voltage equal to
the applied DC voltage.
When a capacitor is connected across a DC voltage source, electrons move out of one
plate of the capacitor, making it
, while other electrons flow
into the other plate of the capacitor, making it
.
1-15
IT0351
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