Electrostatic P...

Select the correct statements:

Three long concentric cylindrical shells have radii R, 2R and $$2\sqrt{2}R$$. Inner and outer shells are connected to each other. The capacitance across middle and inner shells per unit length is:

The diagram shows four capacitors with capacitances and break down voltages as mentioned. What should be the maximum value of the external emf source such that no capacitor breaks down?

Three condensers $$C_1, C_2$$ and $$C_3$$ are connected to a 100 volt D.C. source as shown in the figure. If the charges stored on the plates of $$C_1, C_2$$ and $$C_3$$ are $$q_a, q_b$$ and $$q_c, q_d$$ and $$q_e, q_f$$ respectively, then

In the adjoining circuit, the capacity between the points A and B will be

If the voltage across the parallel combination is increase, which capacitor will undergo breakdown first

A network of six identical capacitors, each of value $$C$$ is made as shown in the figure. Equivalent capacitance between points $$A$$ and $$B$$ is

A parallel plate capacitor is made of two dielectric blocks in series. One of the blocks has thickness $$d_{1}$$ and dielectric constant $$k_{1}$$ and the other has thickness $$d_{2}$$ and dielectric constant $$k_{2}$$ as shown in fig. This arrangement can be thought as a dielectric slab of thickness $$d=d_{1}+d_{2}$$ and effective dielectric constant $$k$$. The $$k$$ is then :

Three identical charged capacitors each of capacitance$$5 \mu F$$ are connected as shown in figure. Potential difference across capacitor (3), long time after the switches $${ K }_{ 1 }$$ and $${ K }_{ 2 }$$ are closed, is:

Five identical capacitors, each with capacitance $$C$$ are connected as shown. Find the equivalent capacitance between $$A$$ and $$B$$