Two infinite wires bent in the form of $L$ shape carries current $I$ as shown. What is magnetic field at $O$ ?
  • A$\frac{{{\mu _0}I}}{{4\pi r}}$
  • B$\frac{{{\mu _0}I}}{{2\pi r}} \odot $
  • C$\frac{{{\mu _0}I}}{{4\pi r}} \odot $
  • D$\frac{{{\mu _0}I}}{{2\sqrt 2 \pi r}}$
Medium
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