can anyone tell why do actually moving charges create magnetic field??

Answer 1

That seems to be a question on the order of asking why mass produces gravity. It just seems to be the way the universe is constructed.

One way of looking at it is that a stationary charge produces a pure electric field. To get the EM field for a moving charge, you apply a Lorentz transformation to the static EM field. The twist is that the EM field is actually a tensor and the Lorentz transformation will mix the E and B fields. This means there will be a magnetic field seen.

Answer 2

is the relativistic part of an electric field, as Einstein explained in 1905. When an electric charge is moving from the perspective of an observer, the electric field of this charge due to space contraction is no longer seen by the observer as spherically symmetric due to non-radial time dilation, and it must be computed using the Lorentz transformations. One of the products of these transformations is the part of the electric field which only acts on moving charges - and we call it the "magnetic field".

The quantum-mechanical motion of electrons in atoms produces the magnetic fields of permanent ferromagnets. Spinning charged particles also have magnetic moment. Some electrically neutral particles (like the neutron) with non-zero spin also have magnetic moment due to the charge distribution in their inner structure. Particles with zero spin never have magnetic moment.

A magnetic field is a vector field: it associates with every point in space a (pseudo-)vector that may vary through time. The direction of the field is the equilibrium direction of a magnetic dipole (like a compass needle) placed in the field.

The Lorentz transformation of a spherically-symmetric proper electric field E of moving electric charge (for example, electric field of an electron moving in a conducting wire) from charge's reference frame to non-moving observer's reference frame results in the following term which we can define or label as "magnetic field" and use the symbol B for it for the sake of mathematical simplicity

go to the following link
http://en.wikipedia.org/wiki/Magnetic_field
http://physics.bu.edu/~duffy/PY106/MagField.html

Answer 3

moving charges donot create magnetic field? the flux path of magnetic field can be found by force on a positive charge inside the field

Answer 4

the warm molten metallic contained in the outter center is spinning. This spinning warm metallic creates the magnetic field. If stopped spinning on it is own or due the Earth ceasing to spin it ought to no longer create the magnet field. Gravity ought to nevertheless artwork by way of the undeniable fact that is only a functionality of mass and distance. The moon nevertheless has gravity yet has no magnetic field because it has no molten center.

Answer 5

Polarity.
Positive charges congregate on one end, negative ones on the other.