question_answer

A sphere of radius 2R has a uniform charge density \[\rho .\] The difference in the electric potential at \[r=R\], \[r=0\]from the center is

A) \[\frac{-\rho {{R}^{2}}}{{{\in }_{0}}}\]

B) \[\frac{-2\rho {{R}^{2}}}{{{\in }_{0}}}\]

C) \[\frac{\rho {{R}^{2}}}{3{{\in }_{0}}}\]

D) \[\frac{-\rho {{R}^{2}}}{6{{\in }_{0}}}\,\]