Welcome to Electricity

Electricity is a type of energy used everywhere in society.

thumbnail Mains Electricity
A plug's components (live, neutral, earth wire; fuse) and how to wire it. Double insulation and circuit breakers. The volt equation: power current and voltage and how this could be used to calculate electricity bills. See Mains Electricity.

thumbnail Energy Efficiency
Types of energy (thermal, light, kinetic, chemical, nuclear, potential). What is energy efficiency and how it can be calculated. How home insulation works to reduce energy loss by example of cavity wall and double glazing. See Energy Efficiency.

thumbnail Electromagnetism
The use of electrical current to produce a magnetic field: the electric motor. Electromagnetic induction and how this is used in transformers to increase or decrease voltage in energy supply. See Electromagnetism.

thumbnail Electricity Generation
The importance of generating electricity and the implications. The difference between renewable and non-renewable sources. Different types of electricity generation: nuclear, coal, oil, wind turbines. See Electricity Generation.

thumbnail Current
In a solid metal conductor, current is the flow of free electrons (negatively charged) which move from negative to positive. Creating an overall movement of charge in this direction. Direct and alternating current (AC or DC). See Current.

thumbnail Charge
An atom has a positively and negatively charged portion. Electrical conductors vs insulators. Electrostatic phenomena (static electricity) and its practical applications in industry and the importance of earthing in some circumstances. See Charge.

thumbnail Electrical Circuits
Parallel circuits have junctions and are used in christmas lights for instance. Series circuits is simpler. Ohm's law providing a relationship between voltage, current and resistance (measured in ohms). See Electrical Circuits.