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In hydrogen atom, the electron makes $6.6 \times {10^{15}}$ revolutions per second around the nucleus in an orbit of radius $0.5 \times {10^{ - 10}}\,m$. It is equivalent to a current nearly
  • A$1\, A$
  • B$1\, mA$
  • C$1\,\mu A$
  • D$1.6 \times {10^{ - 19}}\,A$
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