Electrostatics ...

Two identical charged spheres are suspended by strings of equal lengths. The strings make an angle 30° with each other. When suspended in a liquid of density 0.8g cm^–3, the angle remains the same. If density of the material of the sphere is 1.6 g cm^–3, the dielectric constant of the liquid is

A negatively charged plate has charge density of 2 × 10^–6 C /m². The initial distance of an electron which is moving towards the plate, cannot strike the plate, if it is having energy of 200 eV

The charge on 500 cc of water due to protons will be

Electric potential is given by
V = 6x – 8xy² – 8y + 6yz – 4z²Then electric force acting on 2C point charge placed on origin will be

The electric field in a region is radially outward with magnitude E = Aγ₀ . The charge contained in a sphere of radius γ₀ centered at the origin is

Charge q is uniformly distributed over a thin half ring of radius R. The electric field at the centre of the ring is

In the given figure two tiny conducting balls of identical mass m and identical charge q hang from non-conducting threads of equal length L. Assume that θ is so small that tan θ ≈ sin θ , then for equilibrium x is equal to

Consider two points 1 and 2 in a region outside a charged sphere. Two points are not very far away from the sphere. If E and V represent the electric field vector and the electric potential, which of the following is not possible

Three positive charges of equal value q are placed at the vertices of an equilateral triangle. The resulting lines of force should be sketched as in