1. Consider a parallel plate capacitor, fixed area A, and fixed separation, d. Find the energy stored, and after insertion of a slab of dielectric, which completely fills the space between the plates for each of the two cases
(a) The plates are connected to a battery which maintains constant potential difference
(b) The plates have fixed charges +Q and -Q and battery disconnected
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The solution carefully explains the problem with formulas used in solving it.