Charge $1.6 \times 10^{-7} \text{ C}$ is distributed uniformly over the surface of a spherical conductor of radius $R$. The ratio of the electric potential inside the spherical conductor to the electric field on the surface is . . . . . . .
- A$1.6 \times 10^{-7} R^2$
- B$R$
- C$1.6 \times 10^{-7} R$
- D$\frac{1}{R}$
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