Electric charges of $ + 10\,\mu C,\; + 5\,\mu C,\; - 3\,\mu C$ and $ + 8\,\mu C$ are placed at the corners of a square of side $\sqrt 2 \,m$. the potential at the centre of the square is
  • A$1.8\, V$
  • B$1.8 \times {10^6}$ $V$
  • C$1.8 \times {10^5}$ $V$
  • D$1.8 \times {10^4}$ $V$
Medium
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