w***s
发帖数: 61 | 1 there is a metal lattice of unlimited size, you can think of it as many
squares connected with each other and with sides shared. the resistance of the
side of each small square is R, and the resistance of every side of squres is
equal. Now if you add voltage to one side, what's the measured resistance? | s********k
发帖数: 107 | 2 suppose u wanna measure the resistance between A and B. First, imagin current
I flow into lattice through A, but no current flow out through B. Since
symmetry property, I(AB) = I/4. Similar, when only current I flow out B,
I(AB)=I/4.
Add 2 condition together, we know, I(AB)=I/2
【在 w***s 的大作中提到】
: there is a metal lattice of unlimited size, you can think of it as many
: squares connected with each other and with sides shared. the resistance of the
: side of each small square is R, and the resistance of every side of squres is
: equal. Now if you add voltage to one side, what's the measured resistance?
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