Six wires, each of resistance r, are connected so as to form a tetrahedron. The equivalent resistance of the combination when current enters through one corner and leaves through some other corner is

Six wires, each of resistance r, are connected so as to form a tetrahe

1.	Six wires, each of resistance r, are connected so as to form a tetrahedron. The equivalent resistance of the combination when current enters through one corner and leaves through some other corner is
Answer» r 2R `r/3` `r/2` SOLUTION :The equivalent circuits are SHOWN below, the resistance r in arm OP of the balanced Wheatstone bridge is ineffective. ` (##MTG_WB_JEE_PHY_C13_E02_009_S01.png" width="80%"> The equivalentresistancer.AcrossAB isgivenby `(1)/(r. ) = (1)/( 2r) +(1 )/( 2r )+1/r=4/(2 r)ORR.= r/2`

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Six wires, each of resistance r, are connected so as to form a tetrahedron. The equivalent resistance of the combination when current enters through one corner and leaves through some other corner is

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