Point charge ${q_1} = 2\,\mu C$ and ${q_2} = - 1\,\mu C$ are kept at points $x = 0$ and $x = 6$ respectively. Electrical potential will be zero at points
  • A$x = 2$ and $x = 9$
  • B$x = 1$ and $x = 5$
  • C$x = 4$ and $x = 12$
  • D$x = - 2$ and $x = 2$
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