Easy question? Why is voltage drop proportional to current in a resistor? - diyAudio
 Easy question? Why is voltage drop proportional to current in a resistor?
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 2nd May 2013, 11:45 AM #1 diyAudio Member   Join Date: Jun 2010 Location: UK Easy question? Why is voltage drop proportional to current in a resistor? Easy question? Why is voltage drop proportional to current in a resistor? Ok We know the formulae...but what happens inside a resistor to create Voltage Drop? ie we have two values of resistor in series...so we get a voltage drop across them dependant on value of resistance and current drawn.. So what is setting the resistance?.. Just for fun... Regards M. Gregg
 2nd May 2013, 11:47 AM #2 diyAudio Member   Join Date: Jul 2004 Location: Scottish Borders resistance is the difficulty for the electron "cloud" to waft along the path (route). __________________ regards Andrew T. Sent from my desktop computer using a keyboard
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Location: UK
Quote:
 Originally Posted by AndrewT resistance is the difficulty for the electron "cloud" to waft along the path (route).
Well,

Thats the question, why is the difficulty proptional to current and what is a voltage drop?

Regards
M. Gregg

 2nd May 2013, 12:03 PM #4 diyAudio Member   Join Date: Jul 2004 Location: Scottish Borders Imagine the electron cloud as a group of football (american or rugby) trying to get from one end of the field to the other. Place one opponent in the field and the group get to the other end easily (little difficulty) Place 10 opponents in the field. The difficulty has increased. Place 100 opponents in the filed. Now the route the players have to follow is quite convoluted. Some will even "bounce" back when hitting the immovable object. Place 1000 opponents in the field. Getting the idea? The voltage is the number of players trying to push their way along the field. The resistance is the number of opponents. The current is the number of balls that move along the route. (I'm not sure this last is a good analogy). __________________ regards Andrew T. Sent from my desktop computer using a keyboard
 2nd May 2013, 12:04 PM #5 diyAudio Member   Join Date: Jul 2004 Location: Scottish Borders Have you used the water flow analogy? __________________ regards Andrew T. Sent from my desktop computer using a keyboard
 2nd May 2013, 02:04 PM #6 diyAudio Member   Join Date: Jun 2010 Location: UK I get your point, However, these are examples of its like this or that... If you divide the resistance in half we have half the volt drop..at what point can you divide and have no volt drop? what I'm saying is the volt drop is not at one end of the resistance.. So what the question really is...is whats actually happening? IE why does resistance not exist in a super conductor..why should it be temp related?<
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Location: West Australia, near to the beach, natural ambient sounds mostly.
Universal Entropy....

Quote:
 Originally Posted by M Gregg So what the question really is...is whats actually happening? IE why does resistance not exist in a super conductor..why should it be temp related?<
Hmmm, voltage drop is conversion of electrical energy to other forms of energy....the fine points of the hows and whys are maybe not fully answered yet ?.

Dan.

 2nd May 2013, 02:19 PM #8 diyAudio Member   Join Date: Jul 2004 Location: Scottish Borders heat ! __________________ regards Andrew T. Sent from my desktop computer using a keyboard
 2nd May 2013, 02:27 PM #9 expert in tautology diyAudio Member     Join Date: Apr 2002 Location: New York State USA in reality it is all magic... the very idea of converting an "electron" to the radiation of "heat" (heat having a rather specific wavelength range) is in and of itself magical. Why heat? Why not RF, why not xrays, why not visible light? (oh wait, we can do that too... heat+visible light = traditional lightbulb)... It's magic in a very real sense. Electronic Engineering is only concerned with working with what *does happen* not so much why it happens. Physics of course is concerned with figuring out sort of why it happens, but we are rather limited in that regard. Thus it all remains sort of a grand mystery. Like why does *anything* have the properties that it does?? Why does water have a liquid phase at all? And what's up with ice?? _-_-bear __________________ _-_-bear http://www.bearlabs.com -- Btw, I don't actually know anything, FYI -- every once in a while I say something that makes sense... ]
 2nd May 2013, 02:34 PM #10 diyAudio Member   Join Date: Jun 2010 Location: UK Yes, However current flow remains the same through the components..Volt drop is linked to the resistance value.. Regards M. Gregg

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