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Magnetic fields are what electric fields look like in a moving reference frame when you try to approximate Lorentz transforms with Galileian transforms.
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Moving reference is &nbsp;very relative . Moving in relation to what?<br />
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We define magnetic force as the relativistic current when our reference frame is moving with the speed of current.<br />
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Why dont we define it as the relativistic current when our reference frame is immobile in relation to us also being immobile?
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Max Destiny

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thank you ozo you were very helpful
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Well I was revising how 'magnetic' force is created and I came up to an issue?<br />
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Why do we measure only the charge net density only from a frame reference that electrons dont move?
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Well I was revising how 'magnetic' force is created and I came up to an issue?

Why do we measure only the charge net density only from a frame reference that electrons dont move?

''Magnetic force''

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