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Calculate the equivalent resistance betw...

Calculate the equivalent resistance between the points A and B of the network shown in figure

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The equivalent circuit,

As `1/2 = 2/4`, so the given circuit is a balanced Wheatstone bridge. The resistance `10 Omega` in arm CD is ineffective in circuit. We have `(1 Omega + 2 Omega)` and `(2 Omega + 4 Oemga)` parallel resistance. Thus equivalent resistance between A and B.
`R_(eq) = ( 3 xx 6)/(3 + 6) = 2 Omega`
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