Two spheres, each having mass m are suspended from a common point by two insulating strings of length l. The spheres are identically charged and the separation between the spheres is 'd' . Find the charge on each sphere.

Two identical spheres, each of mass m, are suspended from a point by threads. Each sphere carries a charge q. If the angle between the threads is very small, prove that in equilibrium, the distance between the centres of the two spheres is, x=((q^(2)l)/(2pi epsilon_(0)mg))^((1)/(3))

Two tiny spheres each having mass mkg and charge q coulomb are suspended from a point by insulating threads each l metre long but negligible theta with the vertical. Prove that, q^(2)=(4mgl^(2)sin^(2)theta tan theta)4pi epsilon_(0)

Two identical charged spheres of material density p, suspended from the same point by inextensible strings of equal length make an angle theta between the strings, when suspended in a liquid of density sigma the angle theta remains the same. The dielectric constant K of the liquid is

Two particles, each of mass m and carrying a charge q, are suspended from a point by insulated strings each of length 1 cm. In equilibrium each string makes an angle of 45^(@) with the horizontal direction. Prove that, q=sqrt(2mg) , g = acceleration due to gravity.

Two metal spheres, each of mass I g and radius 5 mm, are placed on a smooth horizontal insulated surface. The separation between their centres is 15 cm. Now , one sphere is charged to a potential of 500 V and the other to 1000 V. What are the velocities of the balls when the distance between their centres becomes 30 cm due to repulsion?

Two small balls having equal positive charge Q,C each are supended by two insulating strings of equal length L meter form a hook fixed to a stand . The whole set up is taken to a satellite in space where there is no gravity.Calculate the angle between the two strings and the tension in each string.