Electrostatics ...

Two insulating plates are both uniformly charged in such a way that the potential difference between them is V₂ – V₁ =20V. (i. e., plate 2 is at a higher potential). The plates are separated by d = 0.1 m and can be treated as infinitely large. An electron is released from rest on the inner surface of plate 1. What is its speed when it hits plate 2 (e = 1.6 × 10^–19 C, m_e, = 9.11 × 10^–31 kg)

Two spherical conductors A and B of radii 1 mm and 2 mm are separated by a distance 5 cm and are uniformly charged. If the spheres are connected by a conducting wire then in equilibrium condition, the ratio of the magnitude of the electric fields at the surfaces of spheres A and B is

Let V be the electric potential at a given point. Then the electric field E_x along x-direction at that point is given by

A hollow conducting spherical shell of radius R is charged with Q coulomb. The amount of work done for moving any charge q from the centre to the surface of the shell will be

Figure shows a triangular array of three point charges. The electric potential V of these source charges at the midpoint P of the base of the triangle is

Charge Q is placed on each of (n – 1) corners of a polygon of n sides. The distance of centre of the polygon from each corner is ‘r’, then electric field at centre is

Charges +2 q, + q and +q are placed at the corners A, B and C of an equilateral triangle ABC. If E is the electric field at the circumcentre O of the triangle, due to the charge +q, then the magnitude and direction of the resultant electric field at O is

N identical drops of mercury are charge simultaneously to 10 volt. When combined to form one large drop, the potential is found to be 40 volt, the value of N is

The electrostatic potential energy between proton and electron separated by a distance 1 Å is