Charges $Q_1$ and $Q_2$ are given to two plates of a parallel plate capacitor. The capacity of the capacitor is $C$. When the switch is closed, mark the correct statement (s). (Assume both $Q_1$ and $Q_2$ to be positive.)

Two identical capacitors with identical dielectric slabs in between them are connected in series as shown in the figure. Now, the slab of one capacitor is pulled out slowly with the help of an external force $F$ at a steady state as shown. Mark the correct statement(s).

A dielectric slab fills the lower half of a parallel plate capacitor as shown in the figure. (Take plate area as $A$)

Figure shows a part of a circuit. If all the capacitors have a capacitance of $2 \mathrm{\mu F}$, then the charge on each capacitor is 

In the circuit diagram shown in figure,