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Magnetic field
Coil magnetic field energy
energy of homogeneous magnetic field of toroidal or long cylindrical coil
W =
J
x
J
kJ
MJ
GJ
TJ
eV
kW·h
erg
relative magnetic capacity of matter
μ =
permeability of vacuum
μ
0
=
1.257E-6
H/m
magnetic field strength
H =
A/m
x
A/m
kA/m
A/cm
A/mm
sectional area of field inside coil
S =
m
2
x
mm
2
cm
2
dm
2
m
2
km
2
a
ha
in
2
ft
2
yd
2
coil length
l
=
m
x
Å
nm
μm
mm
cm
dm
m
km
n mile
in
ft
yd
1. Define values of all variables, besides sought quantity
2. Change units if necessary
3. Click "Calculate"