Electrostatic P...

If electric potential of a body is zero, than 

In the figure shown $$ a+3 \mu c $$ charge and $$ a-2 \mu c $$ charge are placed on the x-axis.in which of the regions on the x-axis is a point where the electrical potential is zero.

In the given network of capacitors, the equivalent capacitance between point A and B is

In the given circult, the potenital difference between $$A$$ and $$B$$ is 18V and charge on $$2\,\mu F$$ capacitor is $$24 \, \mu c$$. The value of C is 

An air capacitor is connected to a battery of emf V. A dielectric medium of dielectric constant K is introduced between the plates of this capacitor, with the battery still connected. The final charge on the capacitor plates relative to the previous charge 

Find the ratio of the equivalent capacitance of the two combination between A and B shown in the figure (a) and (b)

Four capacitors of capacitance C,2C, 3C & 4C respectively are connected as shown in figure.Battery is ideal and all the connected wires have no resistance capacitance or inductance.Initially the switch S is open.If at t=0 switch S is closed.
The charge flown through connector AB after switch is closed is.

The potential in certain region is given as $$V = 2x^2$$, then the charge density of that region is 

Equivalent capacitance of given grouping across $$AB$$

The equivalent capacitance in the circuit between $$A$$ and $$B$$ will be