An electron is revolving round a proton, producing a magnetic field of $16\, weber/m^2$ in a circular orbit of radius $1\,\mathop A\limits^o $. It’s angular velocity will be
  • A$10^{17} \,rad/sec$
  • B$1/2\pi \times 10^{12} \,rad/sec$
  • C$2\pi \times 10^{12}\, rad/sec$
  • D$4\pi \times 10^{12}\, rad/sec$
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