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[[Image:Lightning NOAA.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 an invisible force that can produce heat, light, motion and many other physical effects. The force is an attraction or repulsion between electrical charges. More specifically, electricity can be explained in terms of electrical charge, current, voltage, and resistance. the corresponding electrical units are the coulomb for measuring electrical charge, the ampere for measuring current, the volt for potential difference, and the ohm for 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.
Electricity is an invisible force that can produce heat, light, motion and many other physical effects. The force is an attraction or repulsion between electrical charges. More specifically, electricity can be explained in terms of electrical charge, current, voltage, and resistance. the corresponding electrical units are the coulomb for measuring electrical charge, the ampere for measuring current, the volt for potential difference, and the ohm for 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.
Electrical engineering has allowed many practical advances to be made, such as replacing [[steam power]]ed trains with more efficient electric ones.