What happens when a capacitor is taken off a battery? Does that change energy or capacitance?
If the capacitor’s geometry or material does not change, capacitance is fixed. When a capacitor is taken off a battery, charge does not change (the charge has nowhere to go). The energy stored will not change either. If however, something else changes (like moving plates, or adding dielectric), capacitance may change, but the charge is still fixed.
