This video covers:
Brief summary of what transformers do (i.e. step up or step down the voltage)
How transformers work

Exam board specific info:
AQA - Separate/triple science and higher tier only
IGCSE Edexcel - Separate/triple science and higher tier only
Edexcel - Higher tier only
OCR 21st Century - Separate/triple science and higher tier only
OCR Gateway - Separate/triple science and higher tier only

Maths Playlist:
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GCSE Chemistry playlist:
   • GCSE Chemistry - Atoms & Ions  #1  

GCSE Biology Playlist:
   • Video  

GCSE Physics Playlist:
   • Video