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For what value of R (in Omega) in circui...

For what value of `R` (in `Omega`) in circuit, current through `4 Omega` resistance is zero ?

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The correct Answer is:
1
(b) By taking `O` as a refrence potential as current through `4 Omega'` is zero there should be no potential drop across it
Value of `'R'` for this condition `= 1 Omega`
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