Find the magnitude of magnetic field at point $p$ due to a semi - infinite wire given below
  • A$\frac{{{\mu _0}i}}{{4\pi d}}\left( {\sqrt 2  - 1} \right)$
  • B$\frac{{{\mu _0}i}}{{4\pi d}}\left( {1 - \sqrt 2 } \right)$
  • C$\frac{{{\mu _0}i}}{{4\pi d}}\left( {1 - \frac{1}{{\sqrt 2 }}} \right)$
  • D$\frac{{\sqrt 2 {\mu _0}i}}{{4\pi d}}$
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