A current of $i$ ampere is flowing through each of the bent wires as shown the magnitude and direction of magnetic field at $O$ is
A current of $i$ ampere is flowing through each of the bent wires as shown the magnitude and direction of magnetic field at $O$ is
- A
$\frac{{{\mu _0}i}}{4}\left( {\frac{1}{R} + \frac{2}{{R'}}} \right)$
- B
$\frac{{{\mu _0}i}}{4}\left( {\frac{1}{R} + \frac{3}{{R'}}} \right)$
- C
$\frac{{{\mu _0}i}}{8}\left( {\frac{1}{R} + \frac{3}{{2R'}}} \right)$
- D
$\frac{{{\mu _0}i}}{8}\left( {\frac{1}{R} + \frac{3}{{R'}}} \right)$
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- [JEE MAIN 2019]
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