Electrostatic P...

Effective capacitance between A and B in the figure shown is (all capacitances are in $$\mu F$$).

Two identical air filled parallel plate capacitors are charged to the same potential in the manner shown by closing the switch S. If now the switch S is opened and the space between the plates is filled with a dielectric of relative permittivity $$\displaystyle { \varepsilon  }_{ r }$$, then :

Three capacitors connected in series have an effective capacitance of $$4 \mu F$$. If one of the capacitance is removed, the net capacitance of the capacitor increases to $$6 \mu F$$. The removed capacitor has a capacitance of

The electrostatic potential energy of two point charges, $$1$$ $$\mu$$C each, placed $$1$$ meter apart in air is?

Capacitance of a capacitor made by a thin metal foil is $$\displaystyle 2\mu F$$. If the foil is folded with paper of thickness 0.15 mm, dielectric constant of paper is 2.5 and width of paper is 400 mm, the length of the foil will be :

The potential of a large liquid drop when eight liquid drops are combined is $$20\ V$$. Then, the potential of each single drop was :

If a dielectric introduced between the plates of a parallel plate condenser, then which of the following is possible :

The capacity of a parallel plate capacitor with no dielectric substance but with a separation of 0.4 cm is $$\displaystyle 2\mu F$$. The separation is reduced to half and it is filled with a dielectric substance of value 2.8. The final capacity of the capacitor is

The capacity of a parallel plate capacitor with no dielectric substance but with a separation of $$0.4cm$$ is $$2\mu F$$. If the separation is reduced to half and it is filled with a dielectric substance of value $$2.8$$, then the final capacity of the capacitor is

Two capacitors of capacitance $$C$$ are connected in series. If one of them is filled with a substance of dielectric constant $$K$$, what is the effective capacitance?