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Dielectrics and Polarisation

Question

An isolated metallic object is charged in vacuum to a potential $$V_0$$, its electrostatic energy being $$W_0$$. It is then disconnected from the source of potential, its charge being lift unchanged and is immersed in a large volume of dielectric, with dielectric constant K. The electrostatic energy will be?

A

$$K W_0$$

B

$$W_0/K$$

C

$$W_0$$

D

$$\dfrac{W_0}{2K}$$

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Solution

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Correct option is B. $$W_0/K$$

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