Electrostatics ...

A ball of mass 1 g and charge 10^–8 C moves from a point A. Where potential is 600 volt to the point B where potential is zero. Velocity of the ball at the point B is 20 cm/s. The velocity of the ball at the point A will be

Three charges Q, + q and +q are placed at the vertices of an equilateral triangle of side 1 as shown in the figure. If the net electrostatic energy of the system is zero, then Q is equal to

A positively charged particle moving along x- axis with a certain velocity enters a uniform electric field directed along positive y-axis. Its

If 4 × 10²⁰ eV energy is required to move a charge of 0.25 coulomb between two points. Then, what will be the potential difference between them?

A drop of 10^–6 kg water carries 10^–6 C charge. What electric field should be applied to balance its weight (assume g = 10 m/s²)

A small conducting sphere of radius r is lying concentrically inside a bigger hollow conducting sphere of radius R. The bigger and smaller spheres are charged with Q and q (Q > q) and are insulated from each other. The potential difference between the spheres will be

Two point charges +9e and +e are at 16 cm away from each other. Where should another charge q be placed between them so that the system remains in equilibrium?

If 3 charges are placed the vertices of equilateral triangle of charge \'q\' each. What is the net potential energy, if the side of equilateral A is l cm

The distance between charges 5 × 10^–11C and –2.7 × 10^–11C is 0.2 m. The distance at which third charge should be placed in order that it will not experience any force along the line joining the two charges is