Electrostatic P...

One plate of a parallel plate capacitor is suspended from a beam of a physical balance as shown in figure. The area of each plate is $$625 \ cm^2$$ and the distance between these plates is $$5 \ mm$$. If an additional mass $$0.04 \ gm$$ is placed in the other pan of the balance, then the potential difference required between the plates to keep it in equilibrium will be:

A and B are two points in a closed circuit. The potential difference across the condenser of capacity $$5 \mu F$$ is 

Five capacitors of $$ 10\mu F$$ capacity each are connected to a d.c. potential of $$100$$ volts as shown in the adjoining figure. The equivalent capacitance between the points $$A$$ and $$B$$ will be equal to :

In the figure given, the effective capacitance between $$A$$ and $$B$$ will be

The equivalent capacitance between the points A and C is given by

A parallel-plate capacitor of plate area $$A$$ and plate separation $$d$$ is charged to a potential difference and then the battery is disconnected. A slab of dielectric constant $$K$$ is then inserted between the plates of the capacitor so as to fill the whole space between the plates. Find the work done on the system the process of inserting the slab.

In the figure show the potential difference between hollow spheres $$A$$ and $$B$$ is:-

The equivalent capacitance between point $$A$$ and $$B$$ of a combination shown in the figure is

The equivalent capacitance between point $$A$$ and $$B$$ if the circuit shown will be:-

Two parallel plate air capacitors each of capacitance $$C$$ were connected in series to a battery with e.m.f. $$E$$. Then one of the capacitors was filled up with a uniform dielectric with relative permittivity $$k$$. What amount of charge flows through the battery?