The radius of the orbital of electron in the hydrogen atom $0.5 \mathring A$. The speed of the electron is $2 \times {10^6}m/s$. Then the current in the loop due to the motion of the electron is ............. $mA$
- A$1$
- B$1.5 $
- C$2.5 $
- D$1.5 \times {10^{ - 2}}$
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