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`?

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 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 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 point charges 4 mu C and -2 muC are separated by a distance of 1 m in air. At what point on the line joining the charge is electric potential zero?

Two point charges of +2 muC and + 6 muC repel each other with a force of 12 N. If each is given additional charge of -4 muC , what will be the new force ?

Two charged spherical conductors of radii R_1 and R_2 when connected by a conducting wire acquire cahrges q_1 and q_2 respectively. Find the ratio of their surface charge ensities in terms of their radii.