If we introduce a large thin metal plate between two point charges, what will happen to the force between the charges?

Two charges are placed a certain distance apart. A metallic sheet is placed between them. What will happen to the force between the charges ?

When a brass plate is introduced between two charges, the force between the charges

One brass plate is inserted between two charges. The force between two charges will be

The distance of separation between two point charges is doubled? What happens to Coulomb force?

Two point charges q_1 and q_2 are separated by a distance r in space What happens to the force between the charges, i) When the magnitude of one of the point charges is doubled. ii) When the distance of separation is halved.