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Find the resistance across AB....


Find the resistance across AB.

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From figure it is clear that terminal A and point 2 are common point and terminal B and point 1 are common point so redrawing the diagram we have ,

Now ` 6 Omega ` and `15 Omega` are in parallel so effective resistance is
`R_(p) = ((1)/(6) + (1)/(10) + (1)/(15))^(-1) Omega`
` = ((5 + 3+2)/(30))^(-1) Omega`
` = 3 Omega`
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