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In a Wheatstone's bridge a battery of 2V...

In a Wheatstone's bridge a battery of 2V is used all shown in figure-3.56. find the value of the current through the middle branch in the unbalanced condition of the bridge when P`=1Omega,Q=2Omega,R=2Omega` and `S=3Omega` and resistance of middle branch BD is `4Omega`

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