What stops electricity from passing through?

Answer 1

A sheet of aluminum foil will provide shielding against a stream of electrons. Note that a stream of electrons will have trouble getting through air itself. That's because electrons have extremely small mass (compared to atoms), and because the electrons in a stream would have to "break through" all the electrons defining the volume of all the atoms in the air through which they are moving.

Note that a stream of electrons in this case is notelectric current flow as we normally know it. We're talking about as stream of electrons as might emerge from an "electron gun" of some kind. There are real electron guns in cathode ray tubes (CRTs), and this is the source of the beam. But that beam wouldn't fair well trying to move through air, so the tube is highly evacuated. Electrons can be stopped quite readily, though if they are highly accelerated and strike metal targets, X-rays could easily result.

Answer 2

Electricity can be stopped from passing through by insulating materials that do not conduct electricity, such as rubber or plastic. Additionally, an open circuit, which breaks the path for electricity to flow, can also prevent it from passing through. Finally, a device like a switch or a fuse can be used to control the flow of electricity and stop it when necessary.

Answer 3

An open circuit or an insulator

Answer 4

cut the wire

Answer 5

An insulator, like rubber