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What will be the change in the resistanc...

What will be the change in the resistance of a circuit between `A` and `F` consisting of five identical conductors, if two similar conductors are added as shown by the dashed line in figure?

Text Solution

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When two identical resistances are added in place of dashed lines.
`R_2 = R_(eq) = 3r`
But before adding the resistances, the equivalent resistance is
`R_1 =R(eq) =5r`
`:. (R_2)/(R_1) =(3)/(5)`
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