1 4 2 3 Consider a long straight wire of cross section area A carrying...
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1 4 2 3 Consider a long straight wire of cross section area A carrying a current i Let there be n free electrons per unit volume An observer places himself on a trolley moving in the direction opposite to the current with a speed v nAe and separated from the wire by a distance r The magnetic field seen by the observer is 2fr 2 zero 3 2 Tr Hoi TET a outer conductor carry equal currents in opposite directions 4
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