In a region $10^{19}$ $\alpha -$ particels and $10^{19}$ protons per second move to the left, while $10^{19}$ electrons moves to the right per second. The current is
  • A$3.2\,A$ towards left
  • B$3.2\,A$ towards right
  • C$6.4\,A$ towards left
  • D$6.4\,A$ towards right
Medium
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