Recorded in 2007.

This video should be used with the article linked to below.

When two different metals are placed in a salt solution (an electrolyte) the chemistry produces a voltage.  This is called a cell.  By wiring up a number of these cells we can make a battery and use it to power electrical circuits.

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Links To Other Information:

Seawater Battery
Article on seawater battery to accompany this film.

Creative Science Centre
Visit the virtual science centre packed full of things to make and do!

Jonathan Hare

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