8 Two charges 4 cm apart repel each other with a force of 2x

Last updated: 6/10/2023

8 Two charges 4 cm apart repel each other with a force of 2x 10 2 N in air When a dielectric slab of thickness 1 cm is placed between them the force is reduced to 1 5x 102 N Calculate the permittivity of the dielectric