Why does the magnetic field depend on moving charges only?
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Solution
Explanation
A moving charged particle produces both an electric and a magnetic field.
This is because a charged particle will always produce an electric field, but if the particle is also moving, it will produce a magnetic field in addition to its electric field.
This magnetic field produced will depend on the inverse square of the distance to the charge as well as the velocity of the charge .
The equation is given by
which shows the dependence of velocity in the equation.
This shows if velocity is zero, then there is no magnetic field. i.e., the magnetic field is zero.