C = ε0A/d
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.
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