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In the circuit shown in the adjoining figure, the bridge is balanced, the unknown resistance is of

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$4 Ω$

$2 Ω$

$3 Ω$

E.M.F. of the cell is required to find x

answer is B.

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Detailed Solution

Applying balanced Wheatstone bridge condition, we have

$\begin{array}{l} \frac{16}{X} = \frac{4}{0 .5} \\ X = 2 Ω \end{array}$

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