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Charge density seen from a moving reference frame S' (SR + EM)
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[QUOTE="TSny, post: 6570908, member: 229090"] Yes. You can express ##\lambda## in terms of ##n_p## and ##n_e##, where ##n_p## is the number of positive charges per unit length of the cable and ##n_e## is the number of free electrons per unit length. Use the idea of length contraction to see how ##n_p## and ##n_e## transform when switching from frame S to frame S'. [Edited in order to improve notation.] [/QUOTE]
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Charge density seen from a moving reference frame S' (SR + EM)
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