Static electricity (EdExcel)

what is static electricity?

Static electricity is the buildup of electric charge on the surface of objects due to contact and friction with other materials.

Like charges always?

repel

Opposite charges always?

attract

electric charge is measured in?

coulombs

what are the 3 methods of charging

1- i induction

2- friction

3-conduction

what is induction?

When a charged material is brought near an uncharged material, it will induce a charge in the uncharged material.

what is friction?

• Rubbing two insulating materials together (e.g., rubbing a balloon against hair).

what is conduction?

Direct contact between a charged object and a conductor (charges transfer).

what is electroscope?

An electroscope is a device used to detect the presence and type of electric charge in an object

what are electrostatic precipitators?

Electrostatic precipitators are devices used in industries to remove particles like ash and smoke from exhaust gases

how do inkjet printers use static electricity?

Inkjet printers use static electricity to direct droplets of ink onto paper.

state some dangers of static electricity

fire and explosion,industrial accidents and health risks.

what does earthing do?

The earth wire provides a low-resistance path to the earth. If the current becomes too large, it will cause a surge in the earth wire, blowing the fuse. The fuse then cuts off the supply of electricity, making the appliance safe.