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Physics-

General

Easy

Question

The magnetic field at the centre of semicircle o in the figure is

$B = \frac{μ_{0} i}{4 r}$
$\frac{μ_{0} i}{4 r} (1 + 2 π)$
$\frac{μ_{0} i}{4 π r} (π - 2)$
$\frac{μ_{0} i}{4 π r} (π + 2)$

The correct answer is: $fraction numerator mu subscript 0 end subscript i over denominator 4 pi r end fraction left parenthesis pi plus 2 right parenthesis$

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