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Unread 15-02-2015, 20:27
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Ether Ether is offline
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Re: voltage loss over long runs

Quote:
Originally Posted by rich2202 View Post
Basically, you have +12 -> R1 -> load-> R2 -> ground.

But, R2 is sinking a lot of current, which is in essence ground, and not really resisting the current.
R1=R2, and the current is the same through both because they are in series; so the voltage drop across R2 is the same as the drop across R1. R2 is "resisting" current just as much as R1 is.