Charges of $1 \mu C$ are placed at each of the four corners of a square of side $2 \sqrt{2} \text{ m}$. The potential at the point of intersection of the diagonals is . . . . . . .

  • A
    $18 \times 10^3 \text{ V}$
  • B
    $1800 \text{ V}$
  • C
    $18 \sqrt{2} \times 10^3 \text{ V}$
  • D
    None of these.

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