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  4. In the arrangement shown, the magnitude of each resistance is 2 Ω. The equivalent resistance between O and A is given by (14/x) Ω. Here x is

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Q. In the arrangement shown, the magnitude of each resistance is $2 \,\Omega$. The equivalent resistance between $O$ and $A$ is given by $\frac{14}{x} \Omega$. Here $x$ isPhysics Question Image

Solution:

By folding symmetry about AOC
image
$R_{40}=\frac{14}{15} \Omega$