What is the Resistance Between Two Points in an Infinite Grid?

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FermatPell
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Homework Statement



What is the resistance between A i B if resistance is proportional to length, and the resistance of a side of the largest square is R?

Homework Equations



This is nothing more than a bunch of serial (parallel) resistors.

The Attempt at a Solution



n=1 => R=1
n=2 => R=sqrt(2)/2
n=3 => R=2/3

but i can't find it for general N

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If I understand your problem correctly, the answer is zero resistance, seeing as the more resistors which are added in parallel in a circuit, the lower the resistance. If there are an infinite number, than there is an equivalent resistance of zero.
 
The resistance is definitely greater than zero.