I have a question on the difference between charged particals and the field generated by a wire. If we could detect it, would a charged particle, say an electron cause a magnetic field? Another Question, say for a piece of copper wire with a electron flow, is the magnetic field a funcion of the the conductor? Would a piece of copper and a piece of iron have a different magnetic field for a given current? I am curious if say water, not pure of course, would generate a magnetic field when a current flows through it. Curious Mick C
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17 years ago