There are two different types of electricity: alternating current and direct current.
Mains electricity is alternating current (AC). Alternating current changes from one direction to another rapidly. Direct current is electricity supplied by cells and batteries, it flows in ones direction only.
A blog covering and explaining the Edexcel IGCSE Physics specification for the 2016 summer exams. If you are doing just double science, you do not need to learn the stuff for paper two, if you are doing triple you will need to learn all (GOOD LUCK!) I have separated the papers to make files easier to find. Hope it helps :)
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