It has positive and negative charges, which is expressed in coulomb. An electrical phenomenon is caused by flow of free electrons from one atom to another. The characteristics of current electricity are opposite to those of static electricity. Wires are made up of conductors such as copper or aluminum.
What does electricity travel through?
Electricity is a flow of tiny particles called electrons which can travel through wires. This flow is often called an ‘electric current’. Just like water, which can only flow down a hill, an electric current can only flow if there’s something to give it a ‘push’.