A very large sphere having charge \( Q \) uniformly clistributed on the surface is compressed un...

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A very large sphere having charge \( Q \) uniformly clistributed on the surface is compressed uniformly till its radius reduces to \( R \). The work done by the electrie forces in this process is
(A) \( \frac{Q^{2}}{8 \pi E_{0} R} \)
(B) \( \frac{-Q^{2}}{8 \pi \varepsilon_{0} R} \)
(C) \( \Leftrightarrow \)
(D) undefined
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