An electrician requires a capacitance of $$6 \mu \mathrm{F}$$ in a circuit across a potential difference of $$1.5 \mathrm{~kV}$$. A large number of $$2 \mu \mathrm{F}$$ capacitors which can withstand a potential difference of not more than $$500 \mathrm{~V}$$ are available. The minimum number of capacitors required for the purpose is

In figure, charge on the capacitor is plotted against potential difference across the capacitor. The capacitance and energy stored in the capacitor are respectively.

The difference between equivalent capacitances of two identical capacitors connected in parallel to that in series is $$6 \mu \mathrm{F}$$. The value of capacitance of each capacitor is

The equivalent capacitance between A and B is