a
/
b
0
.
5
μ
r
1
0
d
i
s
p
l
a
y
f
i
e
l
d
E
B
n
u
m
b
e
r
o
f
f
i
e
l
d
l
i
n
e
s
N
f
1
0
2
0
4
0
a
/
b
=
0
.
5
μ
r
=
1
0