2007-01-10 15:59:32 · 4 answers · asked by guro 4 in Science & Mathematics ➔ Engineering
All current is positive. When making measurements or calculations, if you get a negative value it means the current is flowing in the opposite direction you assumed it was (or your probes are switched).
G
2007-01-10 16:55:48 · answer #1 · answered by disgruntledpostal 3 · 1⤊ 0⤋
Electric current is created when electrons move from a negative to a positive. Since this is the only way current can be created, it is always positve.
What is interesting, when we measure current, "conventional current" is measured as going from positive to negative, which is the oposite of what the electrons are actually doing.
2007-01-11 01:16:33 · answer #2 · answered by srrl_ferroequinologist 3 · 0⤊ 0⤋
Hi,
For the same reason you will never see any negative MPH (speed) ratings in any specifications.
Amperes (current) is the expression of getting work done as rated in amps. It is impossible to rate something in negative amperage, like rating the speed of a race car in negative mph.
That expression just does not exist in the realm of reality in dealing with amps or mph.
Good question, never heard that asked before,
Darryl S.
2007-01-11 00:21:29 · answer #3 · answered by Stingray 5 · 0⤊ 0⤋
wouldent that require switching the polairty?
2007-01-11 00:06:53 · answer #4 · answered by Chris the Dude 2 · 0⤊ 0⤋