Potential difference between centre $\&$ the surface of sphere of radius $R$ and uniform volume charge density $\rho$ within it will be :
  • A$\frac{{\rho \,{R^2}}}{{6\,{ \in _0}}}$
  • B$\frac{{\rho \,{R^2}}}{{4\,{ \in _0}}}$
  • C$0$
  • D$\frac{{\rho \,{R^2}}}{{2\,{ \in _0}}}$
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