| Table of Magnetic Terms and Conversions | ||
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Magnetic Term |
Symbol |
CGS unit |
Conversion factor |
SI Unit |
|
Magnetic field |
H |
Oe |
79.6 |
A/m |
|
Mass magnetization |
M |
emu/g |
1 |
A.m2/kg |
|
Magnetic Induction |
B |
G |
10-4 |
T, Wb/m2 |
|
Magnetic moment |
m |
emu |
10-3 |
A.m2, J/T |
|
Magnetic permeability |
µ |
G/Oe |
1.26x10-6 |
H/m, Wb/(A.m) |
|
Magnetic flux |
Greekphi |
Mx |
10-8 |
Wb, V.s |
|
Anisotropy const |
K |
erg/cc |
0.1 |
J/m3 |
|
Magnetostriction const. |
lambda |
No dimension |
1 |
No dim |
|
Energy density |
W |
erg/cc |
0.1 |
J/m3 |
| Energy Product | (BH)max | MGOe | 0.126 | kJ/m3 |
Magnetic Field (H)
The magnetic field generated by a current, I passing through a solenoid of turns N and length L is given by H = NI/L
The unit of magnetic field is A/m.
Magnetic Moment (m)
The magnetic moment of the solenoid is given by m= NIA and the unit is A.m2
Magnetic Induction (B)
If a magnetic material is subjected to magnetic field, the material is magnetized and posses N and S poles
The magnetic induction is given by the extent to which the lines of magnetization add to a material in an applied field
B=µo(H+M) where µo is the permeability of free space, H is the magnetic field and M is the magnetization.
Susceptibility (chi)
Susceptibility of a magnetic material determines how responsive a material is to an applied magnetic field
chi=M/H
