A capacitor is a simple electrical device. It consists of three parts sandwiched tightly together. Two outer layers made of conductors are separated by an insulating middle layer. A simple circuit is made with a capacitor, a wire, and a battery. When fully connected, which of the following occurs?

Both plates become positively charged.

The net charge on the capacitor increases zero.

The insulator stops the flow of electricity.

The conductor stops the flow of electricity.