2009
Puzzle #1 (posted 042009)
Consider an infinite grid of 1Ω resistors. Let's call the dimension of the grid n, where a 1dimensional grid would be a line of resistors connected endtoend, a 2dimensional grid would be a rectangular array of resistors, where each resistor is connected at each end to three other resistors, a 3dimensional grid would be a cubic lattice where each resistor is connected at end to five resistors, and so on.
What is the resistance that you would measure across a resistor, as a function on n? For the n = 1, it is just 1 Ω, but for higher n, the grid gives a parallel component that reduces the resistance that you would measure.
Hint: superposition
