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A device that transfers electrical energy from one circuit to another through a shared magnetic field. Used to convert mains electricity into lower voltages in the case of mobile phone transformers. Can also be used to step up the voltage for use in 12V battery inverters etc. Click here for the Transformer Kit equipment page.

Transverse wave

A wave in which the direction of displacement is perpendicular to the direction of propagation, eg. a surface wave of water.