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If electrons flow from negative to positive in a battery, why would you create a circuit like the one in the attachment?
If electrons flow from negative to positive, then the electrons would flow through the led then the resistor, so what good is the resistor?
Quote from: bugsbunnyrlz on May 15, 2011, 12:01:56 PMIf electrons flow from negative to positive in a battery, why would you create a circuit like the one in the attachment?I am pretty sure that electrons flow from positive (more potential) to negative (less potential)
Quote from: newInRobotics on May 15, 2011, 01:30:45 PMQuote from: bugsbunnyrlz on May 15, 2011, 12:01:56 PMIf electrons flow from negative to positive in a battery, why would you create a circuit like the one in the attachment?I am pretty sure that electrons flow from positive (more potential) to negative (less potential) And I'm pretty sure that they don't... Electrons have negative charge.... The more negative that a point is (with need of a reference to somewhere)the more electrons there are there...The more positive (again in respect to somewhere) the more "holes" there are. That somewhere is usually the ground.Holes refer to places that electrons can take in materials. And electrons are the only moving part of the system.So electrons are flowing from negative to positive. And that's the real current flow.Though, in electronics we have adopted the conventional current flow, and that's in fact the opposite.So in electronics, the current flows from positive to negative.But in Physics, the current flows from negative to positive.It's a matter of the science you are referring to.But most of the time the conventional current flow is used, so keep that one in mind.Best Regards, Lefteris Greece
If electrons flow from negative to positive, then the electrons would flow through the led then the resistor
all of them will start moving at the same time
Yes. Imagine a line of ping pong balls a mile long. You push one end and the ball you push doesn't move very far or very fast, but the change happens a mile away instantaneously.
Quote from: MikeK on May 16, 2011, 03:34:36 PMYes. Imagine a line of ping pong balls a mile long. You push one end and the ball you push doesn't move very far or very fast, but the change happens a mile away instantaneously.Hmm, nop. Not instantaneously. Although, this happens extremely fast and when I say really fast I mean within very few femtoseconds, if not attoseconds (in ideal wire circumstances).You see, general relativity and electromagnetism have been proved to be correct....That's a general info though... Nothing in nature happens instantaneously. Physics is only the closest estimation of what happens.Final word, you only count time, or anything else, when it matters to be counted. Best Regards, LefterisGreece
Processors on the order of 1.5 mm certainly do exist and for this reason standing wave effects are taken into consideration when designing these chips.
Hi,Quote from: alzabo on May 20, 2011, 10:49:40 AMProcessors on the order of 1.5 mm certainly do exist and for this reason standing wave effects are taken into consideration when designing these chips. PCB layouts for PC's has been using microwave techniques for a number of years for the same reason.