Find magnetic field at point $P$ in given diagram.
Find magnetic field at point $P$ in given diagram.
- A
$\frac{{{\mu _0}i}}{{4\pi a}}\left( {\sqrt 3 - 1} \right) \odot $
- B
$\frac{{{\mu _0}i}}{{8\pi a}}\left( 1 - {\sqrt 3 } \right) \odot $
- C
$\frac{{{\mu _0}i}}{{8\pi a}}\left( {\sqrt 3 - 1} \right) \odot $
- D
$\frac{{{\mu _0}i}}{{4\pi a}}\left( 1 - {\sqrt 3 } \right) \odot $
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