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  4. In the network shown in the adjoining figure, each resistance is 1 ohm. The effective resistance between A and B is :-

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Q. In the network shown in the adjoining figure, each resistance is 1 ohm. The effective resistance between $A$ and $B$ is :-Physics Question Image

Solution:

image
Given :
$R _{ AB }=\frac{8}{7} r [ r =1\, ohm ]$
$R _{ AB }=\frac{8}{7} r$