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Figure shows two identical parallel plat...

Figure shows two identical parallel plate capacitors connected to a battery with the switch S closed. The switch is now opened, and the free space between the plates of the space between the plates of the capacitors is filled with a dielectric of dielectric constant (or relative permittiveity) `K=3`. Find the ratio of the total electrostatic energy stored in both capacitors before and the introduction of the introduction of the dielectric.

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The correct Answer is:
`(3)/(5)`
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