A parallel plate condenser with a dielectric of dielectric constant K between the plates has a capacity C and is charges to a potential V volt. The dielectric slab is slowly removed from between the plates and then reinserted. The net work done by the system in this process is

Options

(a) zero
(b) 1/2 (K-1)CV²
(c) CV²(K-1)/K
(d) (K-1) CV²

Correct Answer:

zero

Explanation:

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