Electrostatic P...

The electrostatics potential inside a charged spherical is given by $$\phi=ar^2+b$$ where $$r$$ is the difference between centre $$a,b$$ are constants. Then the charge density of the ball is

The capacity of a parallel plate condenser is $$5 \mu F$$.When a glass plate is placed between the plates of the condenser,its potential difference reduces to 1/8 of original value.The magnitude of relative dielectric constant of glass is

All capacitor used in the diagram are identical and each is capacitance $$C$$. Then, the effective capacitance between the point $$A$$ and $$B$$ is

In the figure, find the equivalent capacitance between $$A$$ and $$B$$.

In the given circuit, the potential difference between $$A$$ and $$B$$ is $$18\ V$$ and charges on $$2\ \mu F$$ capacitor is $$24\mu C$$. The value of $$C$$ is:

The effective capacity in the following figure between the points P and Q will be -

A series combination of two capacitances of value $$0.1\ mu F$$ and $$1\mu F$$ is connected with a source of voltage $$500\ volts$$. The potential difference in volts across the capacitor of value $$0.1\ muF$$ will be :

In the circuit shown in figure charge stored in the capacitor of capacity $$5\ \ mu f$$ is

In the circuit below, if a dielectric is inserted into $$C_{2}$$ then the charge on $$C_{1}$$ will 

Find the total capacity of the system of capacitor shown in the figure