what is the diference between electrical energy and magnetic energy?

Question

HOw do you add them to get a sum total?

Answer 1

The energy density of an electric field, in units of energy per unit volume, is one half of the dot product of E and D. In free space in SI units this is just:
eps0 * E^2 / 2
where eps0 is the permittivity of free space.

Similarly, the energy density of a magnetic field is one half of the dot product of B and H. In free space in SI units, this is just:
B^2 / (2 * mu0)
where mu0 is the permeability of free space.

These quantities can be added together to obtain the total electromagnetic energy stored in static fields.

Note that in a material, E and D are not necessarily parallel, nor are B and H. Even an internally isotropic and homogeneous "ideal" dielectric can produce a D vector non-parallel to E, once you account for the geometry of the object, so measuring the electric field density in an object of arbitrary shape can be challenging. An exactly parallel analysis applies for magnetic fields in materials with a relative permeability greater than 1.

Answer 2

electrical energy = magnetic energy.

Answer 3

electricity and magnetism are twin brothers.where there is one the other will be lurking round.both are enrgies similar