Electrostatics ...

Charges are placed on the vertices of a square as shown. Let E be the electric field and V the potential at the centre. If the charges on A and B are interchanged with those on D and C respectively, then

A long, hollow conducting cylinder is kept coaxially inside another long, hollow conducting cylinder of larger radius. Both the cylinders are initially electrically neutral

The figure below shows the electric field lines due to two positive charges. The magnitudes E_A, E_B and E_C of the electric fields at points A, B and C respectively are related as

There is a uniform electric field of intensity E which as shown. How many labelled points have the same electric potential as the fully shaded point?

The electrostatic potential of a uniformly charged thin spherical shell of charge Q and radius R at a distance r from the centre is

A negatively charged oil drop is prevented from falling under gravity by applying a vertical electric field 100 Vm^–1. If the mass of the group is 1.6 × 10^–3 g, the number of electrons carried by the drop is (g = 10 ms^–2)

Under the action of a given coulombic force the acceleration of an electron is 2.5 × 10²² m/s². Then the magnitude of the acceleration of a proton under the action of same force is nearly

An electron initially at rest falls a distance of 1.5 cm in a uniform electric field of magnitude 2 × 10⁴ N/C. The time taken by the electron to fall this distance is