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Electric to be
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In addition, why is there no magnetic field along the line of motion of a charge? If length contraction occurs along this line of motion, I don't see why there is no magnetic field created along this line of motion for other charges to interact to. I get magnetism is fundamental, but at least getting some intuition from relativity, length contraction should also occur along this line (and as a result in some frame people should see the length contraction and increased electric force as a magnetic force in other frames?)