Conversion Tables for Units
Chapter 1
-
8
Name Symbol Relation to SI
electric quadrupole moment,
Q
αβ
, Θ
αβ
, eQ
SI unit C m
2
esu, Gau Fr cm
2
≈
3.335 64
×
10
-14
C m
-2
magnetic flux density, B
(magnetic field)
tesla (SI unit) T = J A
-1
m
-2
= V s m
-2
= Wb m
-2
gauss (emu, Gau) G = 10
-4
T
magnetic flux, Φ
weber (SI unit) Wb = J A
-1
= V s
maxwell (emu, Gau) Mx = G cm
-2
= 10
-8
Wb
magnetic field, H
(volume) magnetization, M
SI unit A m
-1
= C s
-1
m
-1
oersted (emu, Gau) Oe = 10
3
A m
-1
[But note: in practice the oersted, Oe, is only used as a unit for H
(ir)
= 4πH; thus when
H
(ir)
= 1 Oe, H = (10
3
/4π) A m
-1
.]
magnetic dipole moment, m, µ
SI unit A m
2
= J T
-1
emu, Gau erg G
-1
= 10 A cm
2
=10
-3
J T
-1
Bohr magneton
6
µ
B
= eh/2m
e
≈
9.274 02
×
10
-24
J T
-1
nuclear magneton µ
N
= (m
e
/m
p
)µ
B
≈
5.050 79
×
10
-27
J T
-1
magnetizability, ξ
SI unit J T
-2
= C
2
m
2
kg
-1
(6) The Bohr magneton µ
B
is sometimes denoted BM (or B.M.), but this is not
recommended.
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