The figure shows a metre-bridge circuit, with \(A B=100 \mathrm{~cm}\), \(X=12 \Omega\) and \(R=....

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The figure shows a metre-bridge circuit, with \(A B=100 \mathrm{~cm}\), \(X=12 \Omega\) and \(R=18 \Omega\) and the jockey \(J\) in the position of balance. If \(R\) is now made \(8 \Omega\), through what distance will \(J\) have to be moved to obtain balance?
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