Electrostatics

The potential of a large liquid drop when eight liquid drops are combined is 20 V , then the potential of each single drop was

Electric field at point $ (30,30,0) $ due to a charge of $ 0.008 \mu \mathrm{C} $ placed at origin will be, (coordinates are in cm )

An oil drop of radius $ 1 \mu \mathrm{~m} $ is held stationary under a constant electric field of $ 3.65 \times 10^{4} \mathrm{~N} / \mathrm{C} $ due to some excess electrons presence on it. If the density of oil drop is $ 1.26 \mathrm{~g} ...

A dust particle of mass $ 4 \times 10^{-12} \mathrm{mg} $ in suspended in air under the influence of an electric field of $ 50 \mathrm{~N} / \mathrm{C} $ directed vertically upwards. How many electrons were removed from the neutral dust par...

Which one of the following graphs represents the variation of electric potential with distance r from the centre of a non-conducting charged sphere of radius R?

An electric dipole is placed at an angle of 30\(^\circ\) in a non-uniform electric field. The dipole will experience

Four charges equal to + Q are placed at the four corners of a square and a charge (\(-\)q) is at its centre. If the system is in equilibrium, then the value of \(-\)q is

Two small conducting spheres of equal radius have charges +20 \(\mu\) C and \(-\)40 \(\mu\)C respectively and placed at a distance R from each other experience for F1. If they are brought in contact and separated to the same distance, they ...

A charge +q is placed at the origin O of XY-axes as shown in the figure. The work done in taking a charge Q from A to B along the straight line AB is