Electrostatic P...

Some charge Q is to be distributed on 3 concentric shell such that surface charge density on each shell is same as shown. Find the electric potential at r(<a) from point O.

A capacitor of capacitance C = 4 $$\mu F$$  is connected as shown in figure. If internal resistance of the cell is 0.5 . The charge on the capacitor plates is 

The radius of the gold nucleus is $$6.6 \times {10^{ - 15}}m$$  and the atomic number is $$79$$. The electric potential at the surface of the gold nucleus is :

Two plates of equal area A , one a square of side $$2L \times 2L $$ and other a rectangle os sides $$ 4L \times L $$ are used to construct a parallel plate capacitor with plates separation . d . if C is the capacitance , then C=

Four capacitors are joined as shown in the adjoining figure. The capacitance of each is $$ 8\mu F $$. The equivalent capacitance between the points A and B is

A combination arrangement of the capacitors is shown in the figure.
(i) $$ C_1=3 \mu F , C_2=6 \mu F and C_3 = 2 \mu F $$ then equivalent capacitance between 'a'and 'b' is 

In the given figure find $$V_{A} - V_{B}$$.

 An infinite number of charges 'q' each are placed along the x - axis at x =1, x=4 ,x=8 and so on. If the distance are in meters calculate the electric potential at x=0

In the situation shown in figure, what should be the relation between Q and q so that electric potential at centre of the square is zero:

In the shown network chages in capacitor are same, then $$ \frac {C_1}{C_2} is $$