when a current is flowing trought a circuit the electric charge which moves are only negative types or even positive charge move in the opposite toward? in other words: positive charges are heaviest than the negative charges, does this fact stop their moving? thanks
It's not the mass of the charges, it's that only electrons are mobile in normal circuit materials like metals. The rest of the atom becomes positive if an electron is missing, but there are still other electron
bonds holding it to surrounding atoms in the metal, so it can't move. So only the negative electrons carry the current.
Ionized gasses are different, since the ionized atoms aren't bound to neighbors and can move.
In semiconductors there can be a situation where there are missing electrons in the crystal lattice. An electron can move from hole to hole to provide a current flow, which can be regarded as if the hole was moving in the opposite direction. So you get the equivalent of a positive carrier flow, in a practical sense if not in a literal sense.
Bob Masta dqatechATdaqartaDOTcom D A Q A R T A Data AcQuisition And Real-Time Analysis
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