The electric intensity outside a charged sphere of radius $R$ at a distance $r$ $(r > R)$ is
- A$\frac{\sigma R^{2}}{\varepsilon_{0} r^{2}}$
- B$\frac{\sigma r^{2}}{\varepsilon_{0} R^{2}}$
- C$\frac{\sigma r}{\varepsilon_{0} R}$
- D$\frac{\sigma R}{\varepsilon_{0} r}$
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