Magnetic field at the centre $O$ of a square loop of side $'a'$ carrying current $I$ as shown in the figure is
Magnetic field at the centre $O$ of a square loop of side $'a'$ carrying current $I$ as shown in the figure is
- A
$\frac{{{\mu _0}I}}{{\sqrt 2 \pi a}}$
- B
$2\sqrt 2 \frac{{{\mu _0}I}}{{\pi a}}$
- C
$\frac{{2{\mu _0}I}}{{\pi a}}$
- D
Zero
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(Neglect the effect of earth's magnetic field.)
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- [JEE MAIN 2023]
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