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Determine the resistance R(AB) between p...

Determine the resistance `R_(AB)` between points A abd B of the frame made of thin homogeneous wire (as shown in figure), assuming number of successively embedded equilateral tiangles ( with sides decreasing by half ) tends to infinity. Side AB is eual to a, and the resistance of unit length of the wire is `rho`.

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The correct Answer is:
`R_(AB)=(arho(sqrt7-1))/3`
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