What is the mean of electricity

Electricity is the presence and flow of electric charge. Its best-known form is the flow of electrons through conductors such as copper wires.

Electricity is a form of energy that comes in positive and negative forms, that occur naturally (as in lightning), or is produced (as in generator). It is a form of energy which we use to power machines and electrical devices. When the charges are not moving, electricity is called static electricity. When the charges are moving they are an electric current, sometimes called 'dynamic electricity'. Lightning is the most known - and dangerous - kind of electricity in nature, but sometimes static electricity causes things to stick together.

Electricity can be dangerous, especially around water because water is a form of conductor as it has impurites like salt in it. Since the nineteenth century, electricity has been used in every part of our lives. Until then, it was just a curiosity seen in a thunderstorm.

Electricity can be created if a magnet passes close to a metal wire. This is the method used by a generator. The biggest generators are in power stations. Electricity can also be generated by combining chemicals in a jar with two different kinds of metal rods. This is the method used in a battery. Static electricity is created through the friction between two materials - for instance a wool cap and a plastic ruler. This may make a spark. Electricity can also be created using energy from the sun, as in photovoltaic cells.