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Windings $\text{‘A’,’B’}$ and $\text{‘C’}$ have $20$ turns each and are wound on the same iron core as shown, along with winding $\text{‘X’}$ which has $2$ turns. The figure shows the sense (clockwise/anti-clockwise) of each of the windings only and does not reflect the exact number of turns. If windings $\text{‘A’,’B’}$ and $\text{‘C’}$ are supplied with balanced $3$-phase voltages at $50 \text{ Hz}$ and there is no core saturation, the no-load $\text{RMS}$ voltage (in $\text{V}$, rounded off to $2$ decimal places) across winding $\text{‘X’}$ is

_______________.

           

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