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Ten electrons are equally spaced and fixed around a circle of radius $R$. Relative to $V = 0$ at infinity, the electrostatic potential $V$ and the electric field $E$ at the centre $C$ are
  • A$V \ne 0$ and $\vec E \ne 0$
  • B$V \ne 0$ and $\vec E = 0$
  • C$V = 0$ and $\vec E = 0$
  • D$V = 0$ and $\vec E \ne 0$
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