Electrostatics ...

The dimension of (1/2) ɛ₀E²(ɛ₀ : permittivity of free space; E: electric field) is

In the rectangle, shown below, the two corners have charges q₁ = –5 µC and q₂ = +2.0 µC. The work done in moving a charge +3.0 µC from B to A is (take1/4πɛ₀ =10¹⁰ N–m²/ C²)

If q is the charge per unit area on the surface of a conductor, then the electric field intensity at a point on the surface is

A hollow conducting sphere of radius R has a charge (+Q) on its surface. What is the electric potential within the sphere at a distance r = R/3 from its centre?

Two spheres A and B of radius \'a\' and `b\' at same electric potential. The ratio charge densities of A and B is

Electric field intensity at a point in between two parallel sheets with like charges of same surface charge densities (σ) is

In an hydrogen atom, the electron revolves around the nucleus in an orbit of radius 0.53 × 10^–10 m. Then theelectrical potential produced by the nucleus at theposition of the electron is

Three identical charges each of 2µC are placed at the vertices of a triangle ABC as shown in the figure
If AB + AC = 12 cm and AB. AC = 32 cm², the potential energy of the charge at A is

The acceleration of an electron in an electric field of magnitude 50 V/cm, if e/m value of electron is 1.76 × 10¹¹ C/kg, is