A) \[\frac{Q}{4\pi {{\in }_{0}}{{R}_{1}}^{2}}\]\[\]
B) \[\frac{Qr_{1}^{2}}{4\pi {{\in }_{0}}{{R}^{4}}}\]
C) \[\frac{Qr_{1}^{2}}{3\pi {{\in }_{0}}{{R}^{4}}}\]
D) \[0\]
Correct Answer: B
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