At which of the two points, `1` or `2`, of a charged capacitor with nonparallel plates is the surface charge density greater?

The plates of a parallel plate capacitor are, not exactly parallel. The surface charge density therefore :

If the two plates of the charged capacitor are connected by a wire, then

If a small sphere of mass m and charge q is hanged from a silk thread at an angle theta with the surface of a vectical charged conductinb plate, then for equilibrium of sphere the surface charge density of the plate -

If a small sphere of mass m and charge q is hung from a silk thread at an angle theta with the surface of a vertical charged conducting plate, then for equilibrium of sphere, the surface charge density of the plate is

Assertion: The force with which one plate of a parallel plate capacitor is attracted towards the other plate is equal to square of surface density per epsilon per unit area. Reason: The electric field due to one charged plate of the capacitor at the location of the other is equal to surface density per epsilon .

Figure shows a horizontal parallel plate capacitor is lowered on a liquid surface in such a way that its lower plate is just submerged in the liquid of dielectric constant k . Find the height to which the liquid level will be raised between the plates if the capacitor plates are given a surface charge density +sigma and -sigma on its plates.

A parallel plate capacitors of plate area A has a total surface charge density +sigma on one plate and a total surface charge density -sigma on the other plate. The force one plate due to the other plate is given by :