
30-1
Inductance is a property of all electrical conductors. It is a measurable quantity; therefore, it has a
ph
ysical
di
mension,
a me
asurement
un
it
(t
he
he
nry),
as we
ll
as re
ference
st
andards
. It is fo
und
as se
lf-
inductanceL
of a sin
gle
co
nductor
an
d
as mu
tual inductance M
in th
e
ca
se
of tw
o
or mo
re
co
nductors
.
In
ductors
ca
n
va
ry
in co
nstruction,
bu
t
wi
ndings
in th
e
fo
rm
of co
ils
ar
e
th
e
mo
st
fr
equent
. In th
is
ca
se,
th
ey
ha
ve
sp
ecic
ge
ometrical
pa
rameters:
su
rface
A, le
ngth
l, an
d
a nu
mber
of tu
rns
of wi
ndings
N. e
path of magnetic ux can be specially shaped by magnetic cores. Figure 30.1 shows examples of dierent
inductive elements of elec ...