A capacitor of capacitance C is charged fully by connecting it to a battery of emf E. It is then disconnected from the batteryi) if the separation between the plates of the capacitor is doubled, what will happen to a) charge stored by capacitor b) potential difference across it. c) field strength between the plates d) energy stored by the capacitor.
ii) also state in each case now if a dielectric slab with k=A fills the entire space.