Magnet Ball for iPhone Do it Yourself
Magnetic energy and electric energy are related by Maxwell's equations. The potential energy of a magnet of magnetic moment m in a magnetic field B is defined as the mechanical work of magnetic force (actually of magnetic torque) on re-alignment of the vector of the magnetic dipole moment, and is equal: Magnet Ball for iPhone Do it Yourself
E_{\rm p,m} = -m\cdot B
while the energy stored in an inductor (of inductance L) when current I is passing via it is
E_{\rm p,m} = {1\over 2}LI^2.
This second expression forms the basis for superconducting magnetic energy storage.
Energy is also stored in a magnetic field. The energy per unit volume in a region of space of permeability \mu containing magnetic field B is:
u={1\over 2}{B^2 \over \mu}
If the magnetic field is an area in the x,y directions, then 3D fundamental magnoflux energy may be formed by applying a voltage at right angles in the z direction.
E_{\rm p,m} = -m\cdot B
while the energy stored in an inductor (of inductance L) when current I is passing via it is
E_{\rm p,m} = {1\over 2}LI^2.
This second expression forms the basis for superconducting magnetic energy storage.
Energy is also stored in a magnetic field. The energy per unit volume in a region of space of permeability \mu containing magnetic field B is:
u={1\over 2}{B^2 \over \mu}
If the magnetic field is an area in the x,y directions, then 3D fundamental magnoflux energy may be formed by applying a voltage at right angles in the z direction.
From Wikipedia, the free encyclopedia
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