Question

Four resistance each of resistance $18\Omega$ are connected to form a square ABCD. A resistance of $36\Omega$ is connected across the diagonal AC. Find the effective resistance resistance between A and B.

Answer 1

Given,

Four resistance each of $18\Omega$ A resistance of $36\Omega$

so the effective resistance between A and B. is;

Since, $36||18$

So, $R_{Ab}=\frac{18\times 36}{18+36}=\frac{648}{54}=12\Omega$