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I'm writing a small simulator where two objects apply force on each other inversely proportional to square of distance between them. ( like gravty )

in terms of gravity, I think this is the only force that I have to take into consideration.

but I'm confused about electrical and magnetic force.

When the point charges are not moving, the force between them is only electrical ( F = k*q1*q2/d^2 )

but as they start to move, and because a moving charge is "current", one will start to generate a magnetic field and the other will be effected from this field. ( correct ? biot-savart ) in addition to electrical field.

the particles may have some non-zero initial velocity and the particles may not have aimed towards each other.

Generally:

how do I calculate the magnetic field of a moving point charge? ( and finally apply it to the other by F = qVxB where B is the magnetic field generated by other particle )

in addition to attractive electrical force, can opposite charged particles apply "repulsive" magnetic force to each other?

Can someone clarify this to me?

Thanks.

PS: how do i calculate the "current" related to the motion of a charged particle?

does accelerated motion or constant velocity motion result in different currents?

in general: are electrons moving at constant velocity within a wire or are they accelerated from one pole of battery to the other?

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# Magnetic field of a moving point charge

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