# Problem: Suppose a parallel plate capacitor (with capacitance C0) is fully charged (to a value Q0) by a battery. The battery (which supplies a potential difference of V0) stays connected to the capacitor. If the plates of the capacitor are then moved closer together (the separation distance d between the plates is halved), describe quantitatively what happens to: a) the capacitance of the capacitor. b) the potential difference between the plates. c) the energy stored in the capacitor. d) the charge on the plates.

###### FREE Expert Solution

(a) Capacitance:

C = ε0A/d

New capacitance:

86% (214 ratings) ###### Problem Details

Suppose a parallel plate capacitor (with capacitance C0) is fully charged (to a value Q0) by a battery. The battery (which supplies a potential difference of V0) stays connected to the capacitor. If the plates of the capacitor are then moved closer together (the separation distance d between the plates is halved), describe quantitatively what happens to:

a) the capacitance of the capacitor.

b) the potential difference between the plates.

c) the energy stored in the capacitor.

d) the charge on the plates.