z z
Trang 3M χ
χ
Trang 41
2
3
4
5
6
7
8
9
10
Trang 513
14
15
1
2
3
4
−
R L
gM
d d d d T
μ0 × −6
Trang 6
M
m M
π L R2
M
x ≤
(x) =
BI 2π L μ0 x m P
Trang 7B0
p M
1
2
3
4
5
6
7
xOFFSET
x x
Trang 8
χ
y0
μ = (1 + χ)μ0 μ
( ) = − f ( )
FM y0 μ0M2χ V r
4
a5
y0 a
( )
FM y0
f(u) = 4u(3− )(1− ) (1+u u2 2)5 u2
y0
χ
Trang 9χ
y0
χ
z
=
UM 12kzz2
= − χ
kz C1 μ0 M2Vr
l A
χ
Trang 10
−t/τ τ
Q = ωτ/2 Q
τ
τ = 2 ln(0.607 × )
3 ρr
2
μ A
l r
τ τ
τ
μA
2 0.5)
=
an ‾ ‾4 Tω‾‾‾‾Qm k B R
√
τ
Trang 11
an
l
Δz
Δz
Q