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zhiyuan3yu5Best ResponseYou've already chosen the best response.0
http://www.marshall.edu/workshopphysics/images/UNIT22Q7.GIF
 one year ago

eighthourlunchBest ResponseYou've already chosen the best response.0
Been a while since electronics class, so with an extremely large grain of salt, I'd say 1 and 3...the polarity is reversed, but they'd behave the same in either direction.
 one year ago

zhiyuan3yu5Best ResponseYou've already chosen the best response.0
so how is the 2nd one different
 one year ago

vannayenBest ResponseYou've already chosen the best response.1
but i think 1, 2 and3 are the same
 one year ago

eighthourlunchBest ResponseYou've already chosen the best response.0
@vannayen, I'd trust your judgement ahead of mine...it's been too long. In fact, scrap my original answer. I think you're right. The second one *looks* different, but I think that's just layout, not physics.
 one year ago

theEricBest ResponseYou've already chosen the best response.0
I think they're all the same :)
 one year ago
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