An electron in a hydrogen atom revolves around its nucleus with a speed of $6.76 \times 10^6\,ms ^{-1}$ in an orbit of radius $0.52\,\mathring A$. The magnetic field produced at the nucleus of the hydrogen atom is $......T$.
  • A$40$
  • B$50$
  • C$30$
  • D$20$
JEE MAIN 2023, Medium
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