explain current distribution in the figure.

ABCDA is a uniform circular wire of resistance 2ohm. AOC and BOD are two wires along two perpendicular diameters of the circle, each having the same resistance 1ohm. A battery of emf E and internal resistance r is connected between points A and D. Calculate the equivalent resistance of the network.

This is the question for the above figure. please explain current distribution in the figure, thus providing a detailed solution.

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