Electrostatics ...

A conducting sphere of radius R, and carrying a chargeq is joined to a conducting sphere of radius 2R, and carrying a charge – 2q. The charge flowing between them will be

An arc of radius r carries charge. The linear density of charge is λ and the arc subtends a angle π /3at the centre. What is the electric potential at the centre

A neutral water molecule (H₀0) in it\'s vapor state hasan electric dipole moment of magnitude 6.4 × 10^–30 C-m. How far apart are the molecules centres positive and negative charge

A charge Q is fixed at a distance d in front of an infinite metal plate. The lines of force are represented by

In a parallel plate capacitor the separation between the plates is 3 mm with air between them. Now a 1 mm thick layer of a material of dielectric constant 2 is introduced between the plates due to which the capacity increases. In order to bring to the original value the separation between the plates must be made

Find equivalent capacitance between A and B

The radii of the inner and outer spheres of a condenser are 9 cm and 10 cm respectively. If the dielectric constant of the medium between the two spheres is 6 and charge on the inner sphere is 18 × 10^–9 coulomb, then the potential of inner sphere will be, if the outer sphere is earthed

In the following figure, the charge on each condenser in the steady state will be

A metallic spherical shell of radius R has a charge – Q on it. A point charge + Q is placed at the centre of the shell. Which of the graphs shown below may correctlyrepresent the variation of the electric field E with distance r from the centre of the shell