Two point charges exert a force F on each other when they are placed r distance apart in air . When they are placed R distance apart in a medium of dielectric constant K , they exert the same force . The distance R equal

Two charges exert a force of 10 N on each other when separated by a distance 0.2 m in air. When they are placed in another medium of dielectric constant K = 4 , and separated by distance R. they exert same force. The distance R equats to

The ratio of the forces between two charges placed at a certain distance apart in air at half of the distance apart in medium of dielectric .k. is

Two point charges placed at a distance r in air exert a force F on each other. The value of distance R at which they experience force 4F when placed in a medium of dielectric constant K = 16 is :

Two point charges placed at a distance r in air experience a certain force. Then the distance at which they will experience the same force in a medium of dielectric constant K is

Two point charages placed at a distance r. in the air experiene a certain force. Then the distance at which they will experience the same force in the medium of dielectric constant K is

Two similar point charges q_1 and q_2 are placed at a distance r apart in the air. The force between them is F_1 . A dielectric slab of thickness t(ltr) and dielectric constant K is placed between the charges . Then the force between the same charge . Then the fore between the same charges is F_2 . The ratio is

Two charge spheres separated at a distance d exert a force F on each other. If they are immersed in a liquid of dielectric constant K=2, then the force (if all conditions are same) is

Two charge spheres separated at a distance d exert a force F on each other. If they are immersed in a liquid of dielectric constant K=2, then the force (if all conditions are same) is

Two metal spheres of radius r have centers at a distance d apart in air. Find the capacitance of the system.

Find force on short dipole P_(2) due to short dipole P_(1) if they are placed a distance r apart a shown in figure.