Two equal charges placed in air separated by a distance 3 m repel each other with force 0.1 g f. Calculate the magnitude of either of the charges.

Two equal charges placed in air and separated by a distance of 2 m repel each other with a force of 10^-4 N. Calculate the magnitude of either of the charges.

Two charges of +1C and +2C separated by a distance of 1 m, repel each other with a force of vecF_1 and vecF_2 respectively. What is the ratio of vecF_1 and vecF_2 ?

The force between two equal charges placed in a medium at a distance of 9 cm from each other is 16 dyne. On increasing one of the charges by 56 statC, it is found that the distance between the charges must be changed by 3 cm in order to keep the force between them the same Calculate the magnitude of the charges and the dielectric constant of the medium . Given : 1 C = 3 xx 10^9 statC .

Two point charges 4Q and Q are separated by a distance of 1 m in air. Also calculate the electrostatic potential energy of the system of two charges, taking Q = 2 xx 10^-7C .

Two charges 1C and 2C are separated by a distance of 1 m, in air. If the force experienced by the charge of 2C when the charges are (a) like (b) unlike.

Two identical point charges of charge Q are kept at a distance r from each other. A third point charge is placed on the line joining the above two charges, such that all the three charges are in equilibrium. Calculate the magnitude and location of the thrid charge.

Electric potential at a distance 0.9 m from a charge is +50V. Find the magnitude and nature of the charge.