Two capacitors with capacity C₁ and C₂, when connected in series, have a capacitance C_s and when connected in parallel have a capacitance C_p. Which of the following is true ?

A parallel plate capacitor C has a charge q and potential V between the plates. Work required to double the distance between the plates is :

Total energy stored in a 900 µF capacitor at 100 volts is transferred into a 100 µF capacitor. The potential drop across the new capacitor is (in volts)

Five capacitors, each of capacitance value C are connected as shown in the figure. The ratio of capacitance between P and R, and the capacitance between P and Q is :-

Two condensers, one of capacity C and the other of capacity $\frac{\mathrm{C}}{2}$, are connected to a V-volt battery, as shown.

The work done by battery in charging fully both the condensers is :-

The energy required to charge a parallel plate condenser of plate separation $d$ and plate area of cross-section $A$ such that the uniform electric field between the plates is $E$, is 

Three capacitors, each of capacitance $C$ and of breakdown voltage $V$ are joined in series. The capacitance and breakdown voltage of the combination will be