Question

The effective resistance across the points $P$ and $Q$ is

• A. $\frac{r}{4}$
• B. $\frac{r}{2}$
• C. $\frac{r}{8}$
• D. $\frac{r}{16}$

Answer 1

The correct option is B $\frac{r}{2}$

$\frac{1}{R_{eq}}=\frac{1}{2r}+\frac{1}{2r}+\frac{1}{2r}+\frac{1}{2r}$

$R_{eq}=\frac{r}{2}$