Question

A wire is bent into a circle. The effective resistance across the diameter is 8 Ω. Find
the resistance of the wire.

Answer 1

$\frac{1}{r} + \frac{1}{r} = 8 \\ \\ \frac{2}{r} = 8 \\ \\ r = \frac{2}{8} \\ \\ r = \frac{1}{4} \: ohm$