100-150 words

[1]        What Is Electricity?

Nobody knows. It is invisible. Only its effect is measurable. Its main effects are heating, magnetic and chemical effects. When an electric current flows in a material, then that material heats up (as found in lighting and heating). A magnetic field is produced around that material (as used to run motors). It can also alter the chemical composition of the material (as in batteries and anti-corrosion systems).

The current theory is that electricity is the flow of electrons from one atom to another around a loop circuit. If there is a break in the circuit there is no flow of electric current. The breaking of this loop is the method of operation of all electrical safety devices.

Because it cannot be seen, electricity must be treated with care and respect and it must be remembered: