A wire is in the shape of an arc with diameter \( 2 \mathrm{r} \) and subtends an angle of \( \f...

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A wire is in the shape of an arc with diameter \( 2 \mathrm{r} \) and subtends an angle of \( \frac{\pi}{12} \) radian at its centre. If the value of its magnetic induction at the centre be such that \( B=\frac{\mu_{0} i}{(x) r} \), then the value of \( x \) is
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