The force between two charges separated by a distance "1m" is "1.8N" .The charges are in the ratio "1:2 then the charges are

The force of attraction between two charges separated by certain distance in air is F_(1) .If the space between the charges is completely filled with dielectric of constant 4 the force becomes F_(2) .If half of the distance between the charges is filled with same dielectric the force between the charges is F_(3) Then F_(1):F_(2):F_(3) is

The force between two charges 9 mu C and 1mu c separated by a distance 3 m in space is..........

The force between two point electric charges kept at a distance d apart in air is F. If these charges are kept at the sme distance in water, the force between the charges is F'. The ratio F'//F is equal to ……….. .

The force of repulsion between two point charges is F, when these are at a distance of 1 m . Now the point charges are replaced by spheres of radii 25 cm having the charge same as that of point charges. The distance between their centres is 1 m , then compare the force of repulsion in two cases.

Two point charges separated by a distance d repel each other with a force of 9N. If the separation between them becomes 3d, the force of repulsion will be

The force of repulsion between two point charges is F, when these are at distance 0.5m apart. Now the point charges are replaced by spheres of radii 5 cm each having the same charge as that of the respective point charge. The distance between their centres is again kept 0.5 m. Then the force of repulsion will

The force between two point charges in vacuum is 15N, if a brass plate is introduced between the two charges, then force between them will -