An isolated metallic object is charged in vacuum to a potential \( \mathrm{V}_{0} \) using a sui....

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An isolated metallic object is charged in vacuum to a potential \( \mathrm{V}_{0} \) using a suitable source, its electrostatic
\( \mathrm{P} \)
energy being \( \mathrm{W}_{0} \). It is then disconnected from the source and immersed in a large volume of dielectric with dielectric constant \( \mathrm{K} \). The electrostatic energy of the sphere in the dielectric is
(1) \( K^{2} W_{0} \)
(2) \( K W_{0} \)
(3) \( \frac{W_{0}}{K^{2}} \)
(4) \( \frac{W_{0}}{K} \)


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