(1) Dielectric
24.
Dry air is used as the standard for dielectric constant and has a dielectric constant (k) of
constant
1. Dielectric constants of some of the commonly used dielectric materials are:
(2) Plate area
(3) Distance
between
plates
Referring to the formula
you can see that if two capacitors have the same plate
area (A) and the same distance between plates (d), but one has an air dielectric (k = 1)
and the other capacitor has a mica dielectric (k - 6.0), the capacitor with the mica
dielectric has the higher capacity.
The symbol for dielectric constant is
.
The definition for the term dielectric constant is:
k
25.
List four materials commonly used as the dielectric materials in capacitors.
The ability of a
(1)
(3)
material to
(2)
(4)
support an
electrostatic
field as
compared to
air.
Any four
26.
The three factors which determine the capacitance of a capacitor are:
Air
Mica
(1)
Glass
Paper
(2)
Glycerin
Ceramic
(3)
1-9
IT0351
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