Find the equivalent resistance between two ends of the following circuit. [2025]

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Solution

Q.
Find the equivalent resistance between two ends of the following circuit. [2025]

1 r

2 $\frac{r}{6}$

3 $\frac{r}{9}$

4 $\frac{r}{3}$

Ans.
(3)

$\Rightarrow \frac{1}{R_{eq}} = \frac{1}{\frac{r}{3}} + \frac{1}{\frac{r}{3}} + \frac{1}{\frac{r}{3}}$

Or $R_{eq} = \frac{r}{9}$

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