Changes

[[Image:Htryt5.jpg|right|thumb|200px|Lightning strikes during a night-time thunderstorm. Energy is radiated as light when powerful electric currents flow through the Earth's atmosphere.]]

[[Image:Htryt5.jpg|right|thumb|200px|Lightning strikes during a night-time thunderstorm. Energy is radiated as light when powerful electric currents flow through the Earth's atmosphere.]]

Electricity is the flow of electrons. Electrical charge is measured in Coloumbs. A basic element of electricity is the electric circuit. A circuit is a closed path that allows for movement of charges. Current is the name given to the movement of charges. The study of electricity involves the behavior of charges, current and voltage with the components that make up the electrical circuit. Electrical engineering has allowed many practical advances to be made, such as replacing [[steam power]]ed trains with more efficient electric ones.

Electricity is [[energy]] that can be converted to heat, light, motion and many other physical effects through the force produced in the attraction or repulsion between charged particles. It is measured in terms of [[electrical charge]], [[current]], [[voltage]], and [[resistance]]. A basic element of electricity is the electric circuit. A circuit is a closed path that allows for movement of charges. Current is the name given to the movement of charges. The study of electricity involves the behavior of charges, current and voltage with the components that make up the electrical circuit. Electrical engineering has allowed many practical advances to be made, such as replacing [[steam power]]ed trains with more efficient electric ones.

==Polarity==

==Polarity==