A closely packed coil having $1000$ turns has an average radius of $62.8\,cm$. If current carried by the wire of the coil is $1\,A$, the value of magnetic field produced at the centre of the coil will be (permeability of free space $=4 \pi \times 10^{-7}\,H / m$ ) nearly

  • [NEET 2022]
  • A

    $10^{-1}\,T$

  • B

    $10^{-2}\,T$

  • C

    $10^{2}\,T$

  • D

    $10^{-3}\,T$

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